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.
P0442 and P0455 OBD2 Codes in 1997 Mitsubishi Eclipse: EVAP System Leak Detected or ECM Issue?
I own a 1997 Mitsubishi Eclipse and am experiencing a persistent check engine light with diagnostic codes P0442 and P0455. The evaporative emission control (EVAP) system has bee...
Mitsubishi Eclipse | P0442P0300 Random/Multiple Misfires in 1996 Ford Windstar 3.8L V6 - Cold Start & Long Drive Issues
I own a 1996 Ford Windstar with a 3.8L split-port V6 engine and automatic transmission. After driving for 30+ minutes and then parking for 15 minutes, especially when ambient te...
unknown | P030098 Ford Expedition OBD Code P0402: How to Diagnose and Fix EGR Valve and DPFE Sensor Issues
My 1998 Ford Expedition has triggered the check engine light, and my friend, a mechanic, advised me to test the EGR valve. He suggested using a tube connected to the top of the ...
98 Ford Expedition | P0402P1105 Diagnostic Code on 1999 Mitsubishi Villager: Which OBD-II Code System to Use?
I'm encountering P1105 fault code on my 1999 Mitsubishi Villager and am unsure which OBD-II code system applies—Ford, Mitsubishi, or Mercury. My vehicle manual references the 'u...
99 Villager | P11051996 Windstar 3.8L Split Port with P0300: Random Misfire After Warm-Up in Temperatures Above 45°F
I own a 1996 Windstar with a 3.8L split-port engine and automatic transmission. After driving for 30 minutes or more and then parking for approximately 15 minutes, if the ambien...
96 Windstar | P0300P1506 Fault on 1996 Mazda 626: Causes, Diagnostics & Cost-Saving Fixes
Hi there, I'm dealing with a recurring P1506 fault on my daughter's 1996 Mazda 626. The car runs smoothly otherwise, but the idle speed is consistently high at around 800 RPM. I...
Mazda 626 | P1506P0340 Fault Code Diagnosis and Fix for 2001 Ford F150 SuperCrew
I'm experiencing fault code P0340 on my 2001 Ford F15-0 SuperCrew, which indicates a Camshaft Position Sensor Circuit Malfunction. I'd like to know the correct steps to diagnose...
2001 F150 Supercrew | P0340P1151 OBD2 Code in 1998 Ford F-Series 4.6L - 86K Miles
Hello! I'm experiencing a recurring P1151 fault code on my 1998 Ford F150 with the 4.6L engine, currently at 86,000 miles. I've already replaced the upstream O2 sensor, original...
1998 F-series 4.6L | P11512009 Chevy Malibu P2135 Code: Throttle Position Sensor Issue & Fix Guide
Hi everyone, I recently joined this forum and want to thank all members for the helpful discussions — your insights are invaluable. I'm currently troubleshooting a persistent ...
2009 Chevy Malibu | P2135Practical 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.