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 Ford Ranger P0171 Fault Code: Estimated Repair Cost and Diagnosis
What is the estimated repair cost for a P0171 fault code on a 2003 Ford Ranger? The vehicle displays this diagnostic trouble code, which indicates a lean air-fuel mixture in the...
2003 ford ranger | P01712002 Jeep Grand Cherokee P1598 P0753 P0123 P0051 P0031: Diagnosing Multiple OBD-II Codes and Engine Stalling
A month ago, my 2002 Jeep Grand Cherokee began experiencing engine stalling accompanied by a P0301 code (cylinder #1 misfire). I addressed this issue by replacing spark plugs, c...
2002 Jeep Grand Cherokee | P0031P0340 OBD2 Code on 1997 Jeep Grand Cherokee ZJ 4.0L 4x4: Causes, Diagnosis & Fixes
I recently pulled an OBDII diagnostic code P0340 on my 1997 Jeep Grand Cherokee ZJ with a 4.0L V6 engine and 4x4 drivetrain. This code indicates a circuit issue with the Camshaf...
Jeep Grand Cherokee ZJ 4.0L 4x4 | P0340P0340 OBD2 Fault Code in 2006 Volkswagen Jetta GLI: Causes and Solutions
My 2006 Volkswagen Jetta GLI recently triggered the P0340 diagnostic trouble code, which is associated with a camshaft position sensor circuit fault. The vehicle now exhibits he...
2006 Jetta GLI | P0340Mercedes Benz ML350 2006 OBD II Fault Codes P0155, P0150, P0051: Causes and Repair Solutions
Hi everyone, New member here — recently picked up an OBD-II code reader for just $20 on eBay, which has eliminated my reliance on dealership charges! I'm currently seeing thre...
Mercedes Benz ML350 2006 | P00512001 Jeep Grand Cherokee 4.7L Engine P1391 Code: Misfire and Stalling Issues After IAC Replacement
My 2001 Jeep Grand Cherokee with a 4.7L engine is displaying fault code P1391. I recently replaced the Idle Air Control (IAC) valve and Position Control Sensor, cleared the code...
2001 Jeep Grand Cherokee | P1391P0674 Fault Code Resolution for 2009 Duramax Diesel Engine
I recently replaced all the glow plugs on my 2009 Duramax diesel engine due to persistent fault codes indicating issues with each glow plug. While all the glow plugs except #4 w...
Duramax diesel 2009 | P06742000 Eclipse P0740 Fault: Transmission Enters Fail Safe After Initial Shifts
My 2000 Dodge Eclipse is showing check engine light with fault code P0740. The vehicle shifts normally for the first two minutes after starting, but then the transmission abrupt...
2000 Eclipse | P07402010 Chevy Aveo P0303 Fault: Cylinder 3 Misfire - Diagnosis and Fixes
I currently own a 2010 Chevrolet Aveo and am experiencing engine code P0303, indicating a misfire in cylinder 3. I've already replaced the spark plugs, but the issue persists. T...
2010 Chevy Aveo | P03032008 Audi A4 Quattro with 82K Miles: P2293 Code Causes Sulfur Smell and Engine Light (Recall Possible?)
My 2008 Audi A4 Quattro (82,000 miles) started exhibiting a sulfur-like odor during acceleration, accompanied by the check engine light. The issue temporarily resolves after res...
2008 A4 Quattro | P22932012 Ford F-150 P0420 Code: How to Trigger It Safely for Warranty Repair
My 2012 Ford F-150 was towed to a dealership due to severe performance issues — the truck sputtered, failed to accelerate, and eventually stalled. The original mechanic diagnose...
2012 Ford F150 | P04202000 Ford Taurus OBD2 Code P0340: Camshaft Position Sensor Issue After Replacement
I replaced the camshaft position sensor twice, but the P0340 code is still appearing. The vehicle continues to show this diagnostic trouble code even after the replacement. Any ...
2000 Ford Taurus | P0340P0639 Fault Code in 2002 Volkswagen Jetta 1.8L Turbo - Can I Replace Throttle Body Actuator Myself?
My daughter was driving her 2002 Volkswagen Jetta 1.8L turbo (122,000 miles) when she made a U-turn and drove over a bumpy surface. Immediately after, she reported the car sputt...
2002 Volkswagen Jetta | P06392000 Chevrolet S10 4.3L V6 Engine Misfire with P1345 Code - Rough Idle and Intermittent Symptoms
My 2000 Chevrolet S10 equipped with a 4.3L V6 engine is showing fault code P1345. The vehicle exhibits intermittent misfiring, rough idle, and poor engine performance under load...
2000 Chevrolet S10 | P1345Practical 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.