Traditional gasoline car fault
Search fault code and browse forum case posts.
This page is designed for quick diagnosis on gasoline vehicles by combining code lookup with real discussion cases. Enter a fault code to filter related topics, then compare symptom context such as cold start behavior, acceleration load, fuel-trim deviation, ignition misfire pattern, and recent maintenance history. Many codes can be triggered by shared root causes, so use cross-checks from multiple posts before replacing sensors, coils, injectors, or catalytic components.
2003 Mazda Tribute P0316, P0430, P0174 - Rough Acceleration and Misfire Issues
I've been experiencing ongoing issues with my 2003 Mazda Tribute. After replacing the fuel filter, the problem seemed to improve temporarily, but the check engine light remains ...
Mazda Tribute | P01742007 Dodge Grand Caravan P0117 Code: Low Coolant Sensor Voltage and Constant Cooling Fan Operation
I own a 2007 Dodge Grand Caravan that is displaying the P0117 engine diagnostic code. The issue indicates low voltage to the coolant temperature sensor. I have already replaced ...
2007 dodge grand caravan | P01172007 Dodge Hemi 5.7L 1500 4x4 P0522 Check Engine Light Issue - Oil Pressure Sensor Replacement Help
I own a 2007 Dodge Hemi 5.7L 1500 4x4 with the check engine light illuminated and a persistent trouble code P0522. I've already replaced the oil pressure sensor twice, and both ...
2007 dodge hemi 5.7 1500 truck | P05221997 Buick Lesabre P0121 Code Not Clearing After TPS Replacement - Fix & Wiring Issues
I own a 1997 Buick LeSabre with the 3.8L V6 engine, second-hand vehicle with only 44,000 miles and excellent condition. This morning, while pulling into the garage, I noticed th...
1997 Buick Lesabre | P01212002 Jeep Grand Cherokee P0443 Code: How to Fix EVAP Purge Solenoid Circuit Issue
I'm a hobby mechanic trying to get my 2002 Jeep Grand Cherokee back on the road. The vehicle is failing emissions tests due to a persistent check engine light and code P0443 — w...
2002 Jeep Grand Cherokee | P04432004 VW Touareg V8 4.2L - Error Codes P0491 and P0492: Secondary Air Injection System Diagnosis
Hi everyone, I'm new to this forum and seeking expert advice on a recurring issue with my 2004 Volkswagen Touareg V8 4.2L engine. I've been troubleshooting the secondary air in...
2004 VW Touareg V8 4.2 | P04911998 Mercury Villager P0305 Missfire Diagnosis and Solutions
I own a 1998 Mercury Villager experiencing a persistent missfire on cylinder #5, indicated by the P0305 diagnostic trouble code. I have already replaced the distributor cap, rot...
1998 mercury villager | P03051999 Chevrolet Camaro 3.8L V6: Persistent P0171 and P0174 Lean Codes After MAF Replacement
I recently purchased a 1999 Chevrolet Camaro with a 3.8L V6 engine, and I'm currently dealing with persistent P0171 and P0174 diagnostic trouble codes (DTCs). I've already repla...
99 camaro 3.8 v6 | P0171Mazda 3 Zoom Z400 U0100 U0101 Fault: Lost Communication with PCM - Diagnosis and Fixes
Hi everyone, my Mazda 3 (Z400 model) is not starting and the vehicle remains in a revving state. After scanning, I've detected fault codes U0100 and U0101. The diagnostic descri...
Mazda 3 Zoom | U0100P0518 Fault in 2012 Chevrolet Cruze: Is It Really an O2 Sensor Issue?
I recently received the P0518 diagnostic code on my 2012 Chevrolet Cruze, which indicates a lean condition in Bank 1 Sensor 1. I replaced the oxygen sensor based on this code, b...
2012 Chevy Cruze | P05182005 Dodge Cummins Diesel P2509 code
I have a 2005 dodge cummins diesel. I replaced three injectors on my truck after starting truck and driving it down the road I parked it went house came back out later and truck...
2005 Dodge Cummins Diesel | P25092009 Jeep Patriot 4-Cylinder P0445 OBD2 Code: Causes and Solutions
I recently encountered OBD2 diagnostic code P0445 on my 2009 Jeep Patriot with a 4-cylinder engine. I replaced the gas cap, but the issue persists. Are there any other potential...
09 Jeep Patriot | P04452005 Hyundai Tucson P0306 Fault: Car Won't Start Despite Battery and Alternator Repairs
Hi, I'm Luis. I own a 2005 Hyundai Tucson, and at least once every month, the car fails to start and requires a jump boost. The OBD-II diagnostic code displayed is P0306. This h...
2005 Hyundai Tucson | P0306P0523 Fault in 2009 Honda Accord 3.5L: Can It Be Driven Safely?
Is it safe to continue driving a 2009 Honda Accord with the P0523 diagnostic trouble code? The P0523 code indicates an issue with the oil pressure sensor or its associated wirin...
2009 Honda Accord | P05232001 Mercedes S500 P0500 and P0720 Fault Diagnosis - Check Engine Light On After Tire Change
Hi, I'm Mike and I'm experiencing a problem with my 2001 Mercedes-Benz S500. Yesterday, after replacing the rear tires (size 245/45R19), my check engine light turned on. The dia...
2001 S500 Benz | P05002012 Nissan P0603 Error Code: Causes and What to Do After Battery Replacement
Hello, Yesterday my engine stalled and wouldn't restart. I called a roadside service who checked the battery and found it was old and dead — they replaced it. The diagnostic sh...
2012 Nissan | P060397 Ford Expedition Eddie Baur Edition OBD-II ISO 9141-2 Fault Code
I am experiencing an ISO 9141-2 fault code on my 1997 Ford Expedition Eddie Baur Edition with 4-wheel drive. The code appears in the instrument cluster, and I'm trying to diagno...
97 Ford Expedition | P09152003 Dodge Grand Caravan P0202 OBD2 Code: White Smoke and Gas Odor After Replacing #2 Fuel Injector
I own a 2003 Dodge Grand Caravan and am experiencing heavy white smoke coming from the exhaust. I recently replaced the #2 fuel injector, but the issue persists—there is still s...
2003 Dodge Grand Caravan | P02022004 Chevrolet Cavalier 2.2L Front and Rear O2 Sensors Shorted Together - Fault Codes P0130, P0131, P0141, P0134
My recently purchased 2004 Chevrolet Cavalier 2.2L is showing a wiring issue where the front and rear oxygen (O2) sensors are physically connected together. There appears to be ...
2004 2.2 Cavalier | P2177Practical workflow for fault-code troubleshooting
Start by confirming battery voltage and reading freeze-frame data, then inspect wiring and connectors before replacing parts. If the code returns after clearing, record the exact driving or idling condition when it reappears. Prefer case threads with complete repair feedback, because confirmed outcomes provide stronger guidance than one-time symptom descriptions. Following a step-by-step workflow reduces repeated repairs and lowers total diagnosis time.