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.
Repeat P1151, P1152, and P0153 Codes on 1996 Ford Ranger 3.0L V6 with Exhaust and O2 Sensor Diagnostics
I own a 1996 Ford Ranger with a 3.0L V6 engine, 2WD, 5-speed manual transmission. After installing the clutch, the truck immediately started triggering P1151 and P1152 fault cod...
96 Ranger | P01532000 Chevrolet Impala P0300 Random Misfire Code - Diagnosis & Solutions
I own a 2000 Chevrolet Impala and have already replaced the spark plugs, ignition wires, catalytic converter, flex pipe, and one of the ignition coils. I connected the OBD-II sc...
2000 chevrolet impala | P0300Honda Accord 2000: How to Fix OBD2 Code 0-2 PCM Internal Circuit Failure - Can It Be Reset?
Hi everyone, I'm using a Launch X431 scan tool to diagnose my 2000 Honda Accord, and I've encountered the following error code: OBD2 Code 0-2 - PCM Internal Circuit Failure. T...
HONDA 2000 | P0200P0440 OBD2 Code in VW Passat: Causes, Symptoms, and Gas Mileage Impact
Hi everyone, I recently discovered the P0440 diagnostic code on my VW Passat after the check engine light came back on. Although I've seen this code before, I'm not entirely sur...
VW Passat | P04401996 Toyota Tacoma P0420 Code: Causes, Fixes, and Cost Analysis
I own a 1996 Toyota Tacoma, and the check engine light has been on for several months. During my vehicle inspection, it failed as expected. The initial diagnostic showed a fault...
1996 Toyota Tacoma | P0420P0420 Fault in 2001 Toyota Camry 4-Cylinder: Causes, Symptoms, and Diagnosis
I've done some research on P0420 codes, but I still have a few questions about my mother's 2001 Toyota Camry with a 4-cylinder automatic transmission. The car has approximately ...
Camry | P04201998 Mazda Millenia 2.5L P0300: Recurring Idle Misfire After Warm Restart - Fuel Sys 2 OL Fault Explained
I own a 1998 Mazda Millenia with a 2.5L V6 engine and 47,000 miles on the odometer. The check engine light activates every few days, even after I clear the P0300 fault code (mul...
1998 Mazda Millenia | P03002003 Honda Vibe P0125 Code: Diagnosis and Solutions
I've replaced both oxygen sensors, the PVC valve, flushed the coolant system, and installed a new coolant temperature sensor and thermostat. Despite these efforts, I'm still see...
2003 Vibe | P01252002 Dodge Intrepid Check Engine Code P0440: Causes, Fixes & Diagnostics
I recently replaced both the gas cap and the purge solenoid on my 2002 Dodge Intrepid. After the replacement, the check engine light turned off. However, three months later it r...
2002 Dodge Intrepid | P0440PO100 and MAF Sensor Fault on 1997 Nissan Pickup - Choking at 45 mph?
HELP!!! I'm not convinced by Jiffy Lube or AAMCO when they said my check engine light shows PO100 and MAF DrVAF (Mass Airflow Sensor fault). What exactly does that mean? I have ...
MAF | P01021996 Mazda B2300 P0301 and P1131 Fault Codes: Diagnosis and Fixes After Tune-Up
Hi everyone, I'm having trouble with my 1996 Mazda B2300 (equipped with a Ford Ranger engine) that's showing two diagnostic trouble codes: P0301 and P1131. I recently performed...
1996 Mazda B2300 | P03011997 Plymouth Voyager 3.0L Engine P0300/P0302 Codes: Fixed After Crankshaft Position Sensor Cleaning
I've been experiencing recurring P0300 and P0302, P0304, P0306, P0301, P0302, and P0303 diagnostic trouble codes for several months while driving my 1997 Plymouth Voyager with a...
97 Ply. Grande Voyager | P0300Ford Ranger Edge Misfires and Air Leak Diagnosis: P0171, P0174, P0300, P0303, P0305, P0455 Solutions
I'm currently experiencing multiple OBD2 fault codes on my Ford Ranger Edge: P0171, P0174, P0300, P0303, P0305, and P0455. I've already replaced the spark plugs and oxygen senso...
Ford Ranger Edge | P03002001 Dodge Neon OBD2 Code P0300: What It Means and How to Fix It
I'm looking for information about what the OBD2 diagnostic code P0300 means on my 2001 Dodge Neon. Can anyone explain its cause and possible solutions? Thanks for any insights.
2001 Dodge Neon | P03002003 Ford F150 P0301 Code: Idle Rough, Clean Plug - Possible Coil or Vacuum Leak?
Hello, I'm experiencing a P0301 fault code on my 2003 Ford F150 with a 4.6L engine. The vehicle idles roughly despite the #1 spark plug appearing clean, dry, and in good conditi...
03 f150 | P0301P0305 Misfire Diagnosis for 1994 Ford Mustang 3.8L V6 - Solutions and Next Steps
Hi everyone, I'm new to this forum and currently troubleshooting a persistent P0305 cylinder 5 misfire issue on my 1994 Ford Mustang with the 3.8L V6 engine. The car consistent...
1994 Mustang | P03052001 Honda Odyssey P1676 Code Explanation and Related Faults (P0401, P0420)
I own a 2001 Honda Odyssey with approximately 120,000 miles. Recently, my vehicle has triggered three diagnostic trouble codes simultaneously: - P0401: EGR Flow Insufficient —...
2001 Honda Odyssey | P16761996 Nissan Maxima P0125 - Check Engine Light On, Need Help Diagnosing
I have a 1996 Nissan Maxima with the check engine light on. I used an OBD2 scanner to read the code, and it shows P0125. The scanner detected this fault code, but I'm not sure w...
96 Nissan Maxima | P01252002 Pontiac Sunfire P0440 Check Engine Light: How to Diagnose and Fix Emission System Issue
My 2002 Pontiac Sunfire has experienced a recurring check engine light issue, previously resolved by tightening the gas cap and ensuring the fuel tank is at a semi-full level. T...
2002 Pontiac Sunfire | P0440Recurring P1131 and P1151 Fault Codes on 2002 Roush Mustang Stage II - How to Fix Rough Idle and Rich Exhaust?
I own a 2002 Stage II Roush Mustang that has been showing recurring OBD-II fault codes: P0171, P0174, P1131, and P1151. After replacing both upstream HO2 sensors, the MAF sensor...
Roush Mustang | P1131Practical 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.