2013 CHEVY SONIC GIVES 3 CODES P0101 P0128 P0172 AND MISFIRE - Chevy Silverado P0101 Error Code: How To Diagnose And Repair.

Now it's showing codes P0068 & P0101 which is MAP/MAF throttle position sensor and mass or volume airflow A circuit range/performance. Any discrepancy in air volume may alert the computer to this imbalance, sparking the P0101 DTC. Condition/Concern: On rare occasions, some customers may experience a hard start cold, brief rough running on cold start, black exhaust color, and/or SES light. It is still the relationship between the CKP and the CMP. An exhaust gas recirculation (EGR) system that is not working properly. by dnold » Thu Dec 04, 2008 4:38 am. , if the generated code is P0302, the number 2 indicates that cylinder number 2 has a misfire. Changed maf sensor, plugs, injectors, air filter, can't figure it out. The most common cause of P0171 in the Mazda 3 is a vacuum leak interfering with the fuel trim. We use cookies to give you the best possible experience on our website. What this means in plain language is that there’s too much fuel being delivered to combustion chambers on bank 1, or not enough air. P2270: O2 Sensor Signal Stuck Lean - Bank 1\, Sensor 2. used furniture for sale in victoria tx by owner craigslist Low Fuel Pressure (possible plugged/dirty fuel filter!) Exhaust Leak between Engine and first Oxygen Sensor. It also can cost money to ignore it, since driving with a misfire can damage the Silverado’s catalytic converter. 3 liter 83000 mile replaced maf sensor o2 sensors before cat still getting p0101 and p0300 codes can anyone help me; 2003 silhouette 3. This code indicates that there is a problem …. Addressing the P0172,and P0175 Codes involves considering Two Problems: (1) A Dirty Mass Air Flow Sensor(YES Even in the Absence of the P0101 Code indicating a MAF Sensor Problem)the 2nd Video explains WHY to look at it WAY UP FRONT in the Engine Bay): You live in the Higher Altitudes. If your car doesn't have that feature, DIY blog Mad Science has put together a tutorial to roll y. owner/mechanic at 3D Automotive. May 16, 2022 · To diagnose the P0068 Chevrolet code, it typically requires 1. It’s not the most complicated OBDII trouble code to diagnose. P0131 means the O2 oxygen sensor's …. [SIGPIC] [/SIGPIC] 1995 350 "Tool Box Injection". The first thing you should look for when the code appears is a clear understanding of what the code means on the Duramax engine. P0303 is a cylinder-specific misfire code, meaning it’s only the third cylinder that has a misfire. You can have this done by most parts stores or by a quick scan from a local shop. Have been having check engine light issues on my 2013 Chevy Sonic since November. Fixing P0128 in the Chevy Impala is usually a pretty easy thing to do since, 90% of the time, a stuck thermostat will cause the problem. The engine control module (ECM) uses information from the crankshaft position sensor and the camshaft position sensors in order to determine when an engine misfire is occurring. What does the P0128 error code mean? The P0128 code indicates a problem with the cooling system (coolant system). Jan 7, 2023 · Code Definition. 5 l 4 cyl I got some codes wanted to. Issue Severity: MODERATE- Extended driving with this code can cause internal engine damage. Once it does, the coolant temperature sensor is there to keep the temperature above 160° F. answered Jul 8, 2021 by OBDIITech (8. 4 PCV Valve Cover/Intake Manifold Issues. 6L – Ignition coils, spark plugs, and injectors are the …. Within the past year I have replaced plugs, wires, fuel filter, intake gasket and catalytic converters. P0300 is a generic OBDII code that can occur with the Chevy Silverado. Sep 23, 2021 · The P0171 code could either mean that the oxygen sensor detects too much oxygen or too little fuel in the air-to-fuel ratio. The trouble code “P0172 system too rich” means there is too little oxygen in the exhaust. See pricing for the Used 2013 Chevy Sonic LT Sedan 4D. A clogged or damaged fuel injector will cause the air-fuel mixture to lean out in one specific cylinder. The X is replaced with the cylinder number where the cylinder misfire occurs; for example P0301 is a cylinder 1 misfire. P0101: Mass Air Flow (MAF) Sensor Performance. Runs fine, cleaned maf sensor and changed air filter, still getting. P0302 Meaning: Cylinder 2- Misfire Detected. The cylinders closest to the firewall are #1, #2, and #3 from passenger side to driver side. This code indicates that your vehicle's engine is misfiring and can be a drivability threat. This checking to see if the misfire "follows" any of these parts. Often this code causes the Check Engine light to come on and off in cold temperatures. P0030 - Heated Oxygen Sensor (H02S) Heater Control …. Follow along as we further discuss the severity of fuel & air metering DTCs. If the coolant temperature doesn't reach that temperature, or it takes it too long, the P0128. You may smell raw gas coming from the tailpipe. 4L engine 2010-2017 GMC Terrain 2. Before you can diagnose P0303 in your vehicle, you need to find the third cylinder. It’s official: a fully electric Chevy Corvette is coming — with new battery technology to boost its range, acceleration and efficiency. P0171 is often accompanied by P0174 (System Too Lean Bank 2). For Chevy vehicles, code P0101 is often caused by a vacuum leak in the intake system. The P0128 code is a diagnostic trouble code (DTC) that indicates that the engine coolant temperature (ECT) is lower than the manufacturer’s specified operating range. How to Diagnose the P0073 Code. In most cases, other symptoms will present themselves when a P0101 code has been set. Faulty cooling fan (running too much) Faulty coolant temperature (ECT) sensor. Aug 7, 2013 · Just took my 1997 Tahoe in to read the codes and I got P0172 Bank 1 system too rich P0175 Bank 2 system too rich both Confirmed and P0300 Random Multi misfire Intermittent I notice at times i have to hold the starter longer for it to kick over and some times it cranks right over in a split second. Here are the probable parts you will replace to fix the problem. Nov 1, 2018 · P0101 code in the Chevy S10 is crucial to maintaining your truck’s performance and ensuring it runs efficiently. Mar 13, 2024 · The P0172 code is indicative of a System Too Rich (Bank 1) condition in the engine’s air-fuel mixture ratio. Took TB to garage, ran codes and 5 codes came back. Faulty Engine Coolant Temperature Sensor - A P0128 code may also indicate faulty wiring or a defective sensor. The P0303 code, in particular, points a directly on Cylinder 3 within your engine. What does this mean? Code Tech Notes. Can someone please help with what I should check next, I have a 1998 Chevy K1500 5. P0101 code in the Chevy S10 is crucial to maintaining your truck’s performance and ensuring it runs efficiently. Very puzzled, LMM is throwing p0301 p0101 codes and going in reduced power mode. Proper diagnosis and timely attention to these engine codes can prevent …. Here are the most common causes of P0128: Thermostat Stuck Open – Far and away, the most typical cause for the P0128 code is a thermostat that is stuck open. For example, if the cylinder number 1 misfires in a 4-cylinder engine, it will run only on 3 cylinders and will have the code P0301, see the animation. Hello! Working on my buddies 2014 GMC Sierra 1500 5. The check engine light (CEL) will be on. This usually pops up when there are two mis-fire codes, or if the computer can't tell with cylinder is mis-firing. Cylinder number 1 in misfire code P0301 refers to the first cylinder in the firing order. tomorrow panchangam The mass air flow sensor or MAF sensor is part of the intake system in Chevy Sonic responsible for measuring the amount of air entering the engine. P0307 is typically caused by bad spark plugs, plug wires, or coil packs. The Engine Control Module (ECM) determines this length of time based on ambient …. How to repair P0302 Chevrolet code Cylinder 2 Misfire Detected. I took out my MAF and cleaned it with the correct electric parts cleaner as I have Vector's CAI w/ the proper tune and the K&N filter and HSRK installed in my truck. The P0128 code is a diagnostic trouble code (DTC) for "Engine Coolant Temperature Below Thermostat Regulating Temperature. Thermostat $220-$250, a Temperature sensor for coolant $140-$190. Tags Some links I found on the P0172 code: P0172 Mazda Rich Air/Fuel Ratio Bank 1 OBDII Engine Light Trouble Code | Engine-Codes. I am getting codes P0172 & P0175 in a 2010 Chevy Equinox with VIN # 2CNFLFEY7A6211428. I have a 2004 Chevy Silverado with a 5. Code P0130 H02S circuit closed loop (cl) performance (bank1 sansor1) you have to replace the #1 oxygen sensor. Top Causes of a P0128 Code or a Radiator Fan That Won’t Turn Off. The P0128 code is a diagnostic trouble code (DTC) that indicates that the engine coolant temperature (ECT) is lower than the manufacturer’s specified operating …. A misfire occurs when the fuel in a cylinder fails to ignite properly, causing the. The MAP sensor measures the air pressure coming into. Tahoe runs fine, but I got the light last week. It should reach 160º F after 15 minutes. Jan 14, 2023 · Those P0172 P0175 Chevy Silverado codes say your engine runs too rich on both banks (engine’s banks 1 and 2). NOTE: The oxygen sensor couldn’t care less about unburned fuel in the exhaust stream–the sensor is designed to. With that in mind, either too much fuel or not enough air can cause a vehicle to run rich. The DTC P0130 is set by the engine control module (ECM) when it determines that the circuit of oxygen sensor 1 on the first cylinder bank is not working properly. Too much air and/or too little fuel results in the engine running lean setting P0171 or P0174 trouble codes, while too much fuel and/or too little air results in the. Ask Your Own Chevy Question 2014 chevy sonic with the following codes. It is worse with the cruise control on, and usually happens at fixed speed, or near cruising speed when speeding up. This type of misfire can also cause catalyst damage, …. 2010-2013 Mazda 3 & Skyactiv News & Discussion. A blown sensor fuse, caused by a power surge. The OBD II Code that was thrown was P0128, which is coolant with. How to replace the coolant temperature sensor on the thermostat housing. If the code stays P0304, you've ruled out the most common causes of this code. This can also cause a range of other codes. There are other causes, but the swap test can help narrow them down considerably. Repairing P0302 should be considered a high priority. The code P030X (p0301-P0308) means that the cylinder number X misfires, or there is no combustion in that cylinder. 06-07 LBZ & LLY Duramax Powertrain Need some advice on three codes. System Too Rich (Bank 1) Learn More Fixes. P0171 and P0174 occur when the air/fuel mixture on the vehicle gets too lean. I need to ask him what symptoms he is experiencing (I think maybe some rough. body found teller county This diagnostic trouble code is triggered when the Engine Control …. -It can also detect an open circuit. The symptoms and causes will help you determine the exact issue and how to fix it. that has a laundry list of codes starting with p0132 02 signal high bank 1 sensor 1,p0133 02 signal low bank 1 sensor 1,p1133 ho2s bank1 sensor 1 inusfficient …. If it’s bad enough to cause your Sonic’s check engine light to come on, you shouldn’t drive your car at all. This group includes P0100, P0102, P0103, P0104. Far and away, the most common trouble codes on the Chevy Cruze are P1101 and P0171. The control module can malfunction, although this doesn’t occur frequently. Carburetor or throttle body cleaner. There are many potential causes of code P0068. The starter motor is located on the passenger side of the truck,. Locate the MAF sensor 1 on the passenger side of the vehicle; it will be on the pipe leading from the air. There's a video on that a few paragraphs up in the P1101 section. Really, it's -12F outside and has been at or below 0 for a few days now. I have changed the Plugs and wires and am still having trouble. 4L Ecotec engine about 76000 miles. 2008 tahoe check engine light on. If the only stored code is P0171, we can. At some point it threw a MAP code and a replaced it. P0301 definition: Cylinder 1 misfire detected. Computer codes P0101 MAF sensor code and P0300 Random misfire. Nov 1, 2018 · P0101 code in the Chevy Silverado is crucial to maintaining your truck’s performance and ensuring it runs efficiently. P0101 - Mass Airflow metering problem. Does it more when temp drops or - Answered by a verified Chevy Mechanic. How to repair P0303 Chevrolet code Cylinder 3 Misfire Detected. ; Oxygen Sensor– The P0172 code is …. The P0101 trouble code is an OBD-II diagnostic code that specifically points to issues related to the Mass Air Flow (MAF) sensor’s performance. Specific to Chrysler products, these are the more common issues with the P0301 – Cylinder #1 Misfire fault code: Dodge Avengers w/2. The most common cause of the P0171 code – and the P0170 and P0173-P0174 codes – is unmetered air entering the combustion system. I did a compression test - … read more. As far as the misfire, it is misfiring on cyls 4 and 6. keith spellmeier This can result in an uneven power delivery, reduced fuel efficiency, and increased emissions. P0101 code in the Chevy Silverado is crucial to maintaining your truck’s performance and ensuring it runs efficiently. It's and OBD2 code and means that a misfire has been detected in the 7th cylinder in the firing order. I cleaned the MAF, replaced air filter and cleaned air filter box. Keep in mind that even inline engines can have two "banks. Im having an issue with this 2013 silverado 1500 5. P0171 to p0172 2003 trailblazer 4x4 6 cyl P0171 is showing on scanner but not a service light on , then after about 30 miles p0172 go's active and turns service engine light on. I have been told by a couple of Diesel mechanics when I bought the truck that at 230000 miles I need to keep an eye on my water pump. You should only be seeing this code if you have an engine with at least 7 cylinders. Other issues can be low coolant, bad radiator fan or water pump, inaccurate engine coolant temperature sensor (ECT sensor), or bad engine control module. but sience yesterday that i cleaned the spark plugs the only code that show is the p0300. 3L 219,506 miles, serial number: 2GTEC19T331280635. golf carts for sale in iowa craigslist If no leak is found, the next step is to replace the spark plugs. The P0128 OBD II trouble code indicates that your Chevy Sonic’s engine coolant temperature has not reached its required operating temperature within a certain amount of time after starting the car. The most common cause of the P0171 code - and the P0170 and P0173-P0174 codes - is unmetered air entering the combustion system. Code P0128 can be set off by anything that causes fluctuating coolant temperatures or breaks the coolant thermostat’s signal to the PCM. A faulty climate control system is a common symptom of code P0073. If the coolant level is very low, it …. The customer states that the vehicle will randomly shut off. In some cases, this will correc. Failed or Faulty Oxygen Sensor (bank 1, sensor 1) Sticking/Plugged or Failed Fuel Injector. P0302 is a real drivability concern and should be dealt with right away. P0300 is often accompanied by cylinder-specific misfire codes (P030X, where the X indicates the cylinder number that is misfiring). misfire code when shift lever is in drive not overdrive and engine is running around 2500 to 3000 rpms. This was my case, porous cylinder head allowing coolant to enter combustion chamber. P0104 - Mass Air Flow Circuit Intermittent. P0313 is a generic OBD-II trouble code that is displayed in the powertrain control module (PCM). Since I got a good amount of engine vent system experience on one of my older cars it did not take long to figure out what was going on. Several American diplomats who had been stationed in Cuba were forced to cut their tours of duty short and return home last year after suddenly and inexplicably losing their hearin. 8L equipped GM vehicle, then you've come to the right place. has codes P0171-fuel system too lean p0300-engine misfire detected p0621-generator L terminal circuit p2096-post cat fuel trim system low limiti understand all the codes but the one I am having trouble understanding is the p2096. I presume a misfire code applies to the spark, not the presence or absence of fuel. If there are no leaking fuel injectors, the next step is to replace the air filter and clean the Mass Air Flow (MAF. Chevrolet vehicles are known for their performance, reliability, and advanced technology. OBD-II Check Engine Light Trouble Codes for the GM/GMC Duramax below: P0100 Mass or Volume Air Flow Circuit Malfunction. P0172 and P0101 has been found. Tools needed for diagnosing advanced P0171 code causes: OBD II scanner or code reader. What causes alot of power loss when I try to speed up a 2003 Chevy. Sportage (not mine) has had the check engine light on for some time now, most likely the same codes that are listed above. It indicates that your Chevy Cruze is running lean on the bank one side. At the end of our article, you'll find some answers to your top questions and an average repair cost, so you can budget accordingly. 162 Views 0 Replies 1 Participant Last post by DylanE25, 3 mo ago. If you still have an old school timing light, you can clamp it one # 1 and see if the timing light fires and then compare it to the other cylinders. It's a 2017 chevy cruze that has check engine light the codes p1101 and p0172 code. 8L with Codes P0151,P1151 and a misfire on #4. P0103 Mass or Volume Air Flow Circuit High Input. Just spoke with the Chevy service advisor. 4L engine 2012-2017 Buick Verano 2. CODE P0128 What Should I Replace. The regulates the amount of fuel that gets sent to the injectors, helping to maintain a steady fuel pressure. Now it was throwing P0068 P0101 and P0300. the thermostat was changed about a year ago, just replaced the coolant temp sensor, and a week ago noticed the coolant reservoir was empty and added more then and as well as when the cts was replaced, reset the check engine light and when it came back on it …. If you fix it at home, you may need the cost to replace the thermostat ranging around $15-300. Essentially, this means that the Air Flow Sensor is telling the computer that much more air is entering the engine than actually is. What is the Cost to Diagnose the Code P0128 2016 Chevrolet Silverado? Labor: 1. Runs fine, cleaned maf sensor and …. I had heard that could cause a misfire. Just took my 1997 Tahoe in to read the codes and I got. Clean mass air flow sensor $75 to $100. cleared all above stated codes only …. Any thoughts or opinions are greatly appreciated. Powering steering reduced indicator light is on and. Engine misfire: P0613: Transmission control module (TCM) P0411, P0440, P0442, P0446, P0455: it will throw the codes P0101. 4l P0101 125,000 miles Vehicle stalls and is very hard to start. What does the P0171 code mean? A Code P0171 or system too lean bank 1 means either too much oxygen or too little fuel in the exhaust. In this context, "lean" refers to a condition where there is too much air relative to fuel. This list has been updated to includes Chevy/GM Duramax diagnostic trouble codes. Mar 21, 2023 · Definitely misfiring in specific grades of hills, and 4th, 5th or 6th Sometimes in 1st to 3rd. P0101 code in the Chevy Sonic is crucial to maintaining your truck’s performance and ensuring it runs efficiently. 2002 (build date 8/2001) Kia Sportage 2. In the most literal sense, the P0171 code means "System Too Lean (Bank 1). The value should be more than approximately -20 % with the engine running at operating temperature. The heater is noticeably less effective. Related Vehicles: 2012 - 2017 Sonic 1. hillside chapel gainesville ga Common Reason: Code P0101 is often related to a bad mass airflow sensor. I’m back re rando dashboard flashing lights that neither the dealer nor my independent mechanic has been able to dx or fix. The most common repair for P0303 is changing the spark plugs. P0101 is a common OBDII code that indicates an issue with the Mazda 3's MAF sensor. OBD-II Trouble Codes Help Site. P0101 code in the Nissan Pathfinder is crucial to maintaining your truck’s performance and ensuring it runs efficiently. GM shared the news this morning, and released the first images of the upcoming electric Chevrolet Corvette. Related codes that the PCM might store along with a P1101 trouble code includes a P1001, P1100, P1102, P1103, P1104, and P1105 code. Start by checking for intake leaks; intake gaskets are a common cause of multi-cylinder misfiring. This code indicates that there is a problem with your car’s Mass Air Flow (MAF) sensor, specifically, a Range/Performance issue. If the problem persists more tests need to be done to diagnose the problem, see "Possible Causes". can i use mupirocin on my private area The meaning of fault code P0172. Hi all, I'm new with HP tuners and I would appreciate your kind help to solve some issues in my 2007 Chevy avalanche flex-fuel: 1- rich idle with -25 STF and LTF I tried to solve the issue with reset alcohol content, replacing MAF sensor , Engine Temperature Sensor, new Spark plugs and wires. Shareholders of "Angry Birds" creator Rovio Entertainment may see red with the planned sale of the company to Sega Sammy Holdings in what would be another step in. The good news is that in most cases, the cause of this trouble code is often easy to diagnose. Jump to Latest Looking into the reason why, my Zurich-ZR8 scanner from Harbor Freight displayed code P0101. P0102: Mass Air Flow (MAF) Sensor Circuit Low Frequency in the ECM. Last night I got a check engine light, rough running engine & idle along with a wicked vacuum cleaner sound from the top of the engine. Cause If service information does not lead to a solution, inspect the intake manifold bolts for being loose. Three good trips to turn off the MIL. com! '06 Silverado v6 p0101 p0128 p2A01 p0300 heavy misfires. In some cases, this will correct the Check …. P0302 DTC means that there's an engine misfire in cylinder 2. The thermostat is designed to open at a specific temperature to allow coolant to flow and to close when the engine has reached. Unlike a lot of the OBDII codes, this code has to do directly with engine combustion. I have a 2002 chevy tracker 6 cyl. Safe to drive? Discussion in 'Gen 2 down to the dealer in Lake Havasu. how to use an alaskan sawmill Cylinder one is typically the closest to the front of the engine. 24% and 36% When the light comes on it's at random I reset the codes and runs fine after a few hundred miles it throws the dtcs p0172 and p0175. The P0101 Chevy Silverado code is one of the most common DTC codes associated with this pickup truck. PCM software needs to be updated. To diagnose the P0172 Honda code, it typically requires 1. Come join the discussion about performance, modifications, troubleshooting, …. It could be something as simple as cleaning the sensor, or it could be faulty and in need of replacement. An owner may complain of misfire or roughness during a cold start. Steering Message and Code- P0128 - Op Code for service 0401 and 4032680. The cost to diagnose the P0101 Nissan code is 1. The PCM detects that the actual MAF sensor frequency signal is not within a predetermined range of the calculated MAF …. I believe that the thermostat is stuck open. 5L I5 The other Threads on here about this code weren't much help. This code indicates that there is a problem with your truck's Mass Air Flow (MAF) sensor, specifically, a Range/Performance issue. My son has a 2018 Dodge Charger with 3. Can any one help me with this code, system running rich. ; Oxygen Sensor- The P0175 code is thrown when the B2S1 O2 sensor does not register the right amount of. 2015 Chevy Cruze with P0128 code. P0128 isn't the worst code out there, but you should still have a professional mechanic check your car ASAP. I appreciate any guidance on this. Tricks include two test lead hook-ups to diagnose how many coils and which cylinder coils are bad, even before the customer knows! Download Now – $15. light • Poor idle • Excessive fuel smell from the exhaust • Black soot inside the tailpipe• Low power • Engine misfire • Stalling • Hesitation • Hard start, especially a restart after the engine is warm • No start. V6s may have them labeled 1-3 on the front bank and 4-6 on the rear bank, depending on your engine design and manufacturer. This diagnostic procedure supports the following DTC: DTC P0128 Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature. I'm thinking of pulling the front O2 sensor on bank 1 and clearing the code, and seeing if it comes back. DTC p0128 coolant temp below thermostat regulating temp. then bog & misfire at mid range & hard acceleratiion check engine light on but cannot scan no power at diagnostic link … read more Dave Nova. The engine coolant temperature (ECT) is between -37 and +130°C (-34. quilt shops phoenix az To compensate for excessive fuel, the engine computer (PCM) adjusts the air/fuel ratio (long …. If it remains flat, then the O2 sensor is bad. Hey all! a couple weeks ago I had code P0128 pop up, as well as the fans default on and the vehicle would not warm up. The engine still running rich with code …. After that drive I parked it for longer (9hrs) and started it up and it was running/idling really rough and wouldn't go over 10mph. Everything looks good and as far as I can tell all hoses between MAF and engine look great. The meaning of fault code P0133 is: O2 Sensor Circuit Slow Response (Bank 1, Sensor 1). A rich fuel mixture basically means that there's either too much fuel. As a journalist and mechanical engineer, he has made significant contributions to the field of automobiles and trucks. Learn what Trouble Code P0451 means, the cause, and how to fix it. comhas seen a spike since October in legal. A failed oxygen sensor can cause this code. Your car’s computer will set the code when it determines that there’s too much fuel (or too little oxygen) in the engine’s air-fuel mixture. started having problems with my 2019 Chevy Equinox. I have a 2007 chevy cobalt ss 2. waco tribune herald newspaper obituaries This code indicates that your vehicle’s engine is misfiring and can be a drivability threat. I bought a Fixd scanner and got 2 codes…. Check engine light is solid (never flashing). P0300 is a generic OBDII code that can occur with the Chevy Sonic. Jan 27, 2024 · The P0128 code is set when the engine control module (ECM) determines that coolant temperature is lower than the original equipment thermostat’s opening temperature. I am licensed automotive technician with more than 18 years experience. A vehicle’s SAI system is equipped with an air pump. The P0301 code is one among many related trouble codes that correspond to misfires in other cylinders (like P0302 for cylinder 2, P0303 for cylinder 3, and so on). The P0128 code is connected to the cooling system. P0112 IAT sensor circuit low voltage. OBD-II Code P0101 is defined as a Mass Air Flow Sensor Circuit/Performance Malfunction. Replacing the taillights on th. Hello, i get chevy sonic 2012, 1. Check engine light came on and when I checked the code, I initially had a P1101. About 1-2 days later I got the above codes. $7E8 & $7E9 aren't engine codes. If the problem persists, more tests need to be done to diagnose the problem, see "Possible Causes". P0491 code is logged once the vehicle’s powertrain control module (PCM) perceives that there is a possible issue within the SAI system. 3 liter with rough idle,backfiring and racing up to 3000 rpm. Find out what P0128 code means, its symptoms, and how to fix it. P0101 Mass or Volume Air Flow Circuit Range/Performance Problem. What can be causing these codes? I have already replaced spark plugs, air filter and maf sensor. Check engine light, decreased fuel economy, misfire, hard to find idle. Refer to Alcohol/Contaminants-in-Fuel Diagnosis. Aug 21, 2018 · P0302 in the Chevy Sonic is a common OBD II trouble code. 7 vortec misfire was created by Steven1980.