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.
2001 Honda Accord P0300 P0304 P0305 P0306 C1555 - Cylinder Misfire and Rough Idle Diagnosis
I have a 2001 Honda Accord that started showing issues two days ago. While driving on the highway, I noticed the check engine light came on and began flashing, accompanied by no...
2001 Honda Accord | C15552005 Mitsubishi Endeavor LS P0431, P0174, P0421, P0171, P0304, P0431
I have a 2005 Mitsubishi endeavor with the following codes: P0431, P0174, P0421, P0171, P0304, and P0431 and I haven't the faintest idea what any of them mean. I have searched t...
2005 Mitsubishi Endeavor LS | P01712005 Chevy Uplander P0420: How to Confirm Closed Loop Operation and Catalyst Efficiency
I own a 2005 Chevrolet Uplander with 110,000 miles and am experiencing a persistent P0420 catalyst efficiency fault code. I'm trying to understand whether the vehicle is operati...
2005 Chevy Uplander | P04202005 Jeep TJ P2098 Code: Post Catalyst Fuel Trim System Too Lean Bank 2 - Diagnosis and Fixes
I'm experiencing the P2098 code on my 2005 Jeep TJ, indicating a 'Post Catalyst Fuel Trim System Too Lean Bank 2'. This is now the second time this has occurred. My mechanic pre...
05 Jeep TJ | P20982004 Chevy Trailblazer P0410 OBD2 Diagnostic Code: Causes and Fixes
I'm experiencing a P0410 diagnostic code on my 2004 Chevrolet Trailblazer. The code indicates a problem with the Exhaust Gas Recirculation (EGR) system, specifically related to ...
2004 Chevy Trailblazer | P04102003 Jeep Liberty Fuel Gauge Stuck at Empty with P0462 and P0463 Codes
I have a 2003 Jeep Liberty where the fuel gauge is stuck on empty, even though the tank is full. The gas light is also on. I recently performed a partial fuel pump disassembly a...
03 Jeep Liberty | P0462P0443 Fault Diagnosis for 2007 Chevy HHR 2.2L - EVAP Purge Valve Issue
I've already tested the solenoid and it's functioning properly. The engine turns over but does not crank up — any other potential causes? This issue is specifically related to t...
Chevy HHR | P04431996 Acura TL P0402 - EGR Excessive Air Flow Diagnosis and Solutions
Fault code P0402 in a 1996 Acura TL indicates an excessive airflow issue within the Exhaust Gas Recirculation (EGR) system. While many users report P0401 (restrictive airflow), ...
96 ACURA TL | P0402P0171 Diagnostic Guide for 2005 Dodge Grand Caravan SXT
I'm experiencing a P0171 trouble code on my 2005 Dodge Grand Caravan SXT, and I'm looking for clear steps to diagnose the root cause. What are the most common issues associated ...
2005 Dodge Grand Caravan SXT | P0171Honda CR-V P0301 Misfire: Is Bad Gas Really the Cause? | Single Cylinder Issue After 3 Months
Our Honda CR-V has experienced three instances of power loss over the past three months, each time accompanied by a P0301 diagnostic code indicating a misfire in cylinder 1. Des...
Honda CRV | P03012001 GMC Yukon P0430 Code: Catalytic Converter Efficiency Below Threshold After Replacement
My wife's 2001 GMC Yukon has recently triggered the Check Engine Light, and an OBD2 diagnostic scan revealed code P0430 — indicating catalytic converter efficiency below thresho...
2001 GMC Yukon | P04301999 Chrysler 300M P1684 Fault Code: How to Fix No-Start Issue and Get the Car Running Again
Hi, I'm having trouble starting my 1999 Chrysler 300M. The car won't start and the check engine light is showing fault code P1684. What steps should I take to diagnose and fix t...
1999 Chrysler 300M | P1684No Communication with PCM in 2004 Infinity - Troubleshooting Guide
If your 2004 Infinity is showing no communication with the Powertrain Control Module (PCM), follow these step-by-step troubleshooting steps to identify and resolve the issue. 1...
2004 Infinity | P21772000 Mercury Mountaineer P0353 Ignition Coil C Fault - No Spark on Cylinder 3
I own a 2000 Mercury Mountaineer with a 5.0L V8 engine, 2WD, automatic transmission. The vehicle is displaying fault code P0353, indicating an ignition coil C primary/secondary ...
2000 Mercury Mountaineer | P03532008 Ford Explorer Sports Trac C2023 C1991 C0401 Diagnostic and Repair Guide
I own a 2008 Ford Explorer Sports Trac and am currently encountering three diagnostic trouble codes: C2023, C1991, and C0401. I'm seeking accurate information on what these code...
2008 Ford Explorer | C0401Mercedes S430 P0140 and P0160 Fault Codes After Sensor Replacement - No Activity in Bank 1 & 2, Sensor 2
I recently replaced both oxygen sensors on my Mercedes S430, but after the replacement, the vehicle is now showing P0140 and P0160 fault codes for both banks (Bank 1 and 2) at S...
Mercedes S430 | P01402004 Honda Odyssey P0301 P0304 P0306 P0300 P1399 - Misfire Codes and Check Engine Light Issues
I own a 2004 Honda Odyssey and recently experienced a serious issue. Two days ago, while driving on the highway, the check engine light and TCS warning light came on simultaneou...
2004 Honda Odyssey | P0301P0441 Fault Code Reappears in 2006 Kia Optima V6 - What's Next to Replace?
I own a 2006 Kia Optima LX with a 6-cylinder engine. The vehicle periodically triggers Diagnostic Trouble Code (DTC) P0441, indicating a malfunction in the evaporative emission ...
2006 Kia Optima | P0441P2096 Diagnostic Code in 2007 Jeep Wrangler 6-Cylinder: Causes and Solutions
I own a 2007 Jeep Wrangler with a 6-cylinder engine. My wife drives only one mile to work and back each day, which may result in insufficient engine warm-up time. I've noticed t...
2007 Jeep Wrangler | P20962004 Kia Sorrento P0102 and P0113 Trouble Codes: Causes and Fixes
My 2004 Kia Sorrento is displaying two diagnostic trouble codes: P0102 and P0113. I'm looking for accurate information on what these codes mean and how to resolve them. The P010...
2004 Kia Sorrento | P0102Practical 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.