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.
P0498 OBD2 Code in 2004 Dodge Neon: EVAP Emission Valve/Solenoid Malfunction Diagnosis and Fixes
The check engine light has just activated on my 2004 Dodge Neon. The engine now runs roughly, especially at idle, and I've noticed a significant drop in fuel efficiency—approxim...
Dodge Neon | P04981996 Chevrolet Impala SS P0410 and P0420 Codes: Causes, Diagnosis, and Repair Cost
I have a 1996 Chevrolet Impala SS with approximately 116,000 miles. The vehicle is currently displaying diagnostic trouble codes P0410 and P0420. Are these two codes related? Co...
1996 chevrolet impala ss | P0410P0171 and P0174 Diagnostic Help for 2001 GMC Sonoma 4.3L V6 - Lean Condition & Vacuum Leak Troubleshooting
I'm experiencing persistent P0171 (System Too Lean Bank 1) and P0174 (System Too Lean Bank 2) codes on my 2001 GMC Sonoma 4.3L V6 engine. I've pulled freeze frame data showing a...
2001 Sonoma | P01712000 Dodge Stratus EVAP Leak: How Common Are 442 and 455 DTCs After LDP Replacement?
The vehicle initially triggered a P0442 EVAP system leak code. A gas cap replacement did not resolve the issue. The mechanic then removed the fuel tank, replaced the Liquid Dete...
2000 Dodge Stratus | P21772003 Toyota RAV4 P1155 Fault Code: Diagnosis and Repair Guide
My 2003 Toyota RAV4 with a 4-cylinder automatic transmission and 90,000 miles has been displaying fault code P1155. What is the correct diagnosis and fix? Thanks for any insights.
2003 Rav4 | P1155Mitsubishi Lancer 2002 OBDII Code P0705: Transmission Range Sensor Circuit (PRNDL) Fault Diagnosis and Fixes
Hello, I own a 2002 Mitsubishi Lancer, and recently the "Service Engine Soon" light has activated. My OBDII code reader indicates a P0705 fault: 'Transmission Range Sensor Circ...
Mitsubishi Lancer | P0705P0135 and P0300/P0301 Codes on 1998 Toyota Avalon: O2 Sensor Location and Misfire Diagnosis
I'm experiencing trouble codes P0135, P0300, P0301 on my 1998 Toyota Avalon with over 198,000 miles. The traction control warning light is also illuminated. I recently installed...
Toyota Avalon | P0135P0171 and P0300 Fault Codes on 1996 Chevrolet Z28 LT1 Engine: Diagnosis and Fixes for Older Vehicles
I own a 1996 Chevrolet Z28 with approximately 47,000 miles. I've been experiencing intermittent Check Engine light activation over the past few months. The light typically comes...
LT1 | P01712002 f-150-----P0171 and P0174
02 f150 4.6 V8 auto......I am getting these two codes.......i change the fuel filter because that sounded like a good idea but it hasnt helped...i need to know if there is some...
2002 f-150 | P0171P0172 on 2006 BMW
2006 BMW 330i My "service engine soon" light came on yesterday. The code read was P1072 - System Too Rich. After looking through this site and the forums, I see there are a fe...
2006 BMW | P01722002 Dodge Intrepid P0300/P0301: Cold Start Sputtering, Hesitation & Engine Stalling - Diagnosis & Fixes
I'm seeking help with a recurring issue on my 2002 Dodge Intrepid with the 3.5L V6 engine. This vehicle has been reliable for over 90,000 miles with regular oil changes and mini...
Dodge Intrepid | P0300P0171 System Too Lean (Bank 1) - Diagnosis and Repair for 1999 Toyota 4Runner V6
The P0171 diagnostic trouble code (DTC), indicating a system too lean condition on Bank 1, has persisted for over two years in my 1999 Toyota 4Runner V6. It disappeared during t...
1999 Toyota 4 Runner v6 | P01712002 Dodge Ram 1500 OBD2 Code P1685: Remote Starter Not Factory Installed and Transmission Issues Explained
Hi everyone, I'm new to this forum and have a 2002 Dodge Ram Quad Cab 1500 4x4 with a 5.9L V8 engine. After taking my truck to the dealership for diagnostics, they identified OB...
2002 DODGE RAM | P1685Practical 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.