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.
2002 Ford Ranger Hard Starting with P0171 Code - Fuel Pressure & Engine Warm/Cold Issues
Hello everyone, I'm experiencing persistent hard starting issues with my 2002 Ford Ranger 2.3L (77,000 miles). The truck requires multiple cranks—often 2–3 attempts—to start, w...
2002 Ranger | P0171PO442 and PO442 PD Code Explanation for 2000 Mitsubishi Montero Sport
I'm currently seeing both PO44或2 and PO442 PD on my 2000 Mitsubishi Montero Sport. I've checked everything from the gas cap to the fuel vapor system components. Common causes o...
PD 2000 Montero Sport | P0442BMW 1996 328IS Check Engine Light: P1188 and P1189 Fault Code Explanation and Repair Guide
My check engine light turned on today on my 1996 BMW 328IS. I visited a parts store to scan the vehicle and found two fault codes: P1188 and P1189. These codes indicate issues w...
BMW | P11882002 Chevrolet Tahoe 5.3L ZVIN with OBD2 Codes P0172 and P0175 - Fuel Pressure & Sensor Issues
I own a 2002 Chevrolet Tahoe 5.3L (ZVIN) with 76,000 miles. I've already replaced the spark plugs, mass air flow sensor, ignition wires, air filter, and fuel pressure regulator....
2002 chevrolet tahoe | P0172Intrepid 2.7 Engine Fault Codes P0134 and P0154: O2 Sensor Replacement Not Resolving Issue
I've been experiencing persistent fault codes P0134 and P0154 on my Intrepid 2.7 engine, even after replacing the oxygen (O2) sensors. I've thoroughly inspected all related wiri...
Intrepid | P01342005 Dodge Caravan P0406 Fault: EGR Sensor A Voltage High - Causes and Diagnosis
My 2005 Dodge Caravan is showing fault code P0406, which indicates an 'EGR Sensor A Voltage High' issue. What are the common causes of this error, and what steps should I take t...
2005 Dodge Caravan | P04061999 Honda Passport P0300 Code: Multiple Misfires, No Improvement After Coil/Injector Swaps
I own a 1999 Honda Passport with a 3.2L V6 engine and am currently experiencing persistent P0300 misfire codes. The vehicle runs poorly at idle but smooths out when revved. I've...
Honda Passport | P03001999 Jetta 2.0L Wolfsburg Edition P1475 Code: LDP Issue After Charcoal Canister Bypass?
I'm experiencing a P1475 diagnostic trouble code on my 1999 Jetta 2.0L Wolfsburg Edition. This code is related to the Liquid Drain Pump (LDP) system. The issue started after I h...
99 Jetta 2.0 Wolfsburg Edition | P21772004 Mazda MPV P0000 Fault After Battery Replacement and Engine Power Wash
The battery in our 2004 Mazda MPV ES with a 3.0L Ford Duratec engine was showing signs of failure. We replaced the battery, and during the process, we performed an engine power ...
2004 Mazda MPV | P00002003 Chevy Express 3500 P0154 and P0300 Codes: Check Engine Light at 75 mph+
Hi, I'm new to this forum. My 2003 Chevrolet Express 3500 has been showing a check engine light that activates above 75 mph. The van runs smoothly under normal conditions. - OB...
2003 Chevy Express 3500 | P01541997 Chevy Suburban 7.4L P0300 Random/Multiple Cylinder Misfire Diagnosis and Fix
While driving through a heavy rainstorm, my 1997 Chevrolet Suburban with a 7.4L V8 engine began experiencing severe misfires. I initially suspected water ingress, so I continued...
1997 Chevy Suburban | P03001996 Chevrolet Camaro P0304 Cylinder 4 Misfire: Troubleshooting & Fix Steps
I have a 1996 Chevrolet Camaro with a diagnostic code P0304 indicating a misfire in cylinder 4. My wife's father suggested a tune-up, but I'm looking for more specific troublesh...
96 chevrolet camaro | P0304Buick Regal GS Supercharged - P0303 Misfire at 124,000 Miles: Plug Wire or Coil Issue?
My 1998 Buick Regal GS supercharged vehicle has reached over 124,000 miles and recently triggered the 'Service Engine Soon' light with a P0303 diagnostic code indicating a misfi...
Buick Regal GS | P03001998 Subaru Legacy Postal P0400 EGR Code: Diagnosis and Solutions for Persistent Check Engine Light
Hi everyone, I'm looking for help with a persistent P0400 EGR code on my 1998 Subaru Legacy Postal. The car has around 177,000 miles and was purchased third-hand, so it's been t...
1998 Subaru Legacy | P04002000 Mercury Sable P0171 and P0174: Fuel Too Lean in Both Banks - Diagnosis and Repair Guide
I own a 2000 Mercury Sable with a 3.0L OHC engine. After scanning the vehicle, I received diagnostic trouble codes P0171 and P0176, indicating 'Fuel Too Lean Bank 1' and 'Fuel T...
2000 Sable | P0171GMC 98 SONOMA"missing"or"surging" during accel-code P0122
My 98 GMC SONOMA 2.2 LITER 4 CYLINDER has been seemingly "missing" or "starving" for about 4 months now. It drives ok then, during acceleration, it seems to "miss" and "surge" t...
GMC Sonoma | P01222000 Dodge Neon Won't Start After P0340 and P1684 Error Codes - Solutions & Diagnostics
My 2000 Dodge Neon (2.0L 4-cylinder, automatic transmission, 145,000 miles) suddenly stopped starting. The engine turns over but does not fire. Previously, it displayed error co...
2000 Dodge Neon | P03402001 Pontiac Grand Prix GT - P0101 and P0102 Fault Codes Causing Engine Stalling and Jerking
Hi, I'm having a serious issue with my 2001 Pontiac Grand Prix GT. The car will sometimes run for only a few minutes before stalling completely, and on other occasions it won't ...
2001 Grand Prix GT | P0101Practical 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.