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.
P0400 Fault Code on 1997 Mitsubishi Montero FWD: Diagnosis and EGR System Monitoring Methods
P0400 Hello everyone, I own a 1997 Mitsubishi Montero (front-wheel drive, 3.5L engine — not the Sport model) that has been displaying a P0400 diagnostic trouble code, indicating...
1997 Mitsubishi Montero | P04001998 Honda Accord P1457 Code: EVAP System Fault Diagnosis and Repair Guide
I own a 1998 Honda Accord 4-cylinder and recently encountered the check engine light triggered by fault code P1457, which is a manufacturer-specific code. I'm looking for clear ...
HONDA | P14571998 Ford Contour P1380 and P1381 Fault: Camshaft Position Actuator & Timing Issues
I own a 1998 Ford Contour with a four-cylinder engine and approximately 89,000 miles. The vehicle is currently displaying two diagnostic trouble codes: P1380 (Camshaft Position ...
1998 Ford Contour | P1380P0135 and P1380/P1381 Faults on 1998 Ford Contour - O2 Sensor & Camshaft Position Issues
I own a 1998 Ford Contour with a four-cylinder engine and approximately 89,000 miles. I'm currently experiencing two diagnostic trouble codes: P0135 (O2 Sensor Circuit Malfuncti...
1998 Ford Contour | P0135P0141 OBD2 Fault Code in 1996 Ford F150: Causes and Fixes
Hi everyone, I'm looking for help with a check engine light issue on my 1996 Ford F15-0 2-wheel-drive pickup. The vehicle has an inline 6-cylinder fuel-injected engine paired wi...
1996 Ford F150 | P0141P0300 Misfire Code on 2001 Oldsmobile Bravada: Diagnosis and Repair Attempts
I own a 2001 Oldsmobile Bravada with 85,000 miles and have been experiencing recurring engine performance issues. Initially, the vehicle would suddenly buck while driving on hig...
Bravada | P0300How to Fix P0440 Evap Emissions Malfunction in a 1999 Blazer (OBD2 Code Solution)
I'm looking for advice on diagnosing and fixing the P0440 OBD2 code on my 1999 Blazer. What should I check or try to resolve this evaporation emissions malfunction? Any reliable...
99 Blazer | P2177How to Fix OBD2 Code P1131 in 2000 Ford F150: Meaning and Solution
Does anyone know what OBD2 diagnostic code P1131 means for a 2000 Ford F150? The code indicates 'Lack of Upstream Heated Oxygen Sensor Signal - Sensor Indicates Lean' condition....
2000 F150 | P1131P0401 EGR Flow Insufficient Code on 1998 Ford F-150 4.6L Engine - Diagnosis and Fixes
My 1998 Ford F-15
98 Ford F-150 4.6L | P0401Mazda P1455 Error Code: How to Fix in 1998 Mazda Protege with Auto Transmission and Air Conditioning
Can anyone help me diagnose this OBD II fault code on my 1998 Mazda Protege? The vehicle has an automatic transmission, air conditioning, and cruise control. The full diagnostic...
mazda | P1455P0171 and P0174 OBD2 Codes Explained - 1996 Chevrolet Corvette
I recently encountered OBD2 fault codes P0171 and P0174 on my 1996 Chevrolet Corvette, indicating Bank 1 and Bank 2 are both running too lean. The fuel tank was initially about ...
1996 Corvette | P0171Practical 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.