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.
P0440 Diagnostic Code on 1997 GMC Jimmy: Causes and Solutions
I recently started noticing my 1997 GMC Jimmy becoming sluggish while driving. The airbag warning light is blinking, and if I don't reduce speed significantly, the vehicle will ...
1997 GMC Jimmy | P0440P0402 and P0155 on 1999 Cougar
Hi, I am currently receiving both the P0402 (excessive flow in the EGR system) and P0155 (malfunction exists in heater circuit for oxygen sensor 1 in bank 2) along with manufact...
1999 Cougar | P0155P0420 Code Explanation and Diagnosis for 2003 Honda S2000 with New Catalytic Converter
I recently installed a new catalytic converter and mufflers on my 2003 Honda S2000, both completed in early this week. On Sunday afternoon, the check engine light activated. I t...
2003 Honda S2000 | P0420P0138 Fault on 2000 Jeep TJ: Causes and Solutions for O2 Sensor Circuit Issues
I recently had my vehicle's diagnostic system checked and found a P0138 code. After clearing the code, it returned during short drives. The truck runs smoothly under normal cond...
2000 Jeep TJ | P01381996 GMC Suburban P0102 and P0175 Fault: Symptoms, Diagnosis, and MAF Sensor Issues
I own a 1996 GMC Suburban that has recently started exhibiting erratic behavior. In the past, it would occasionally trigger both P0175 (System Too Rich - Bank 2) and its Bank 1 ...
96 Suburban | P01021996 Plymouth Voyager P0300 and P0306 Misfire: Causes, Fixes, and Cost-Saving Solutions
My wife drives a 1996 Plymouth Voyager with persistent engine misfire codes: P0300 (random misfire) and P0306 (cylinder 6 specific misfire). I understand that P0300 indicates a ...
96 Plymouth Voyager | P03001998 Ford Contour P0340 Code: Stalls at Idle After Replacing Camshaft Position Sensor
We have recently replaced the camshaft position sensor, cleaned the IAC valve, mass air sensor, installed new spark plugs and a new fuel filter. The vehicle accelerates smoothly...
1998 Ford Contour | P0340Toyota corolla 2001 with code P0420
Hi I have a corolla 2001 with 140,000 miles on it. i am getting error code P0420, last year i have changes to O2 sensor (bank 1) and MAF sensor. I went to mechanic and tested it...
Toyota Corolla | P0420Chevy Express Van P0300 Random Misfire: Causes, Diagnostics & Fixes for 6.0L Engine with 325,000 Miles
I own a 2004 Chevrolet Express Van (6.0L V8) with 325,000 miles on it and have recently started experiencing intermittent random misfire issues, indicated by the OBD2 diagnostic...
chevy express van | P030099 Chrysler Sebring 2.5L V6 P0171 Fault: Engine Dies, No Power, Fuel Pump Sound, Post-Service Diagnosis
My daughter was driving home when the car suddenly died, as if it had run out of fuel or lost all power. I heard the fuel pump engage, so I connected an OSBII scanner and retrie...
99 Chrysler Sebring 2.5L v6 | P01712001 Mazda MPV P0302 and P0481 Fault Codes: Causes and Solutions
I own a 2001 Mazda MPV and recently encountered two diagnostic trouble codes: P0302 (cylinder 2 misfire) and P0481 (cooling fan circuit fault). I already understand the potentia...
MAZDA MPV | P0302PO122 Throttle Position Sensor Code - 2000 Pontiac Montana 3.4L Diagnosis and Solutions
I'm experiencing symptoms of a faulty throttle position sensor (TPS) along with the PO122 diagnostic code on my 2000 Pontiac Montana 3.4L. I replaced the TPS and cleared the cod...
2000 Pontiac Montana 3.4L | P0122P1105 Fault Code: What Does It Mean for Mitsubishi Eclipse? Can I Download the Service Manual Without Alldata?
I'm getting fault code P1105 on my Mitsubishi Eclipse, which relates to the fuel pressure solenoid. What does this error specifically mean? Is there a way to download the offici...
Mitsubishi Eclipse | P1105PO301 Diagnostic & Repair Advice for 2000 Ford Taurus 3.0L Engine
Year: 2000 Make: Ford Model: Taurus Engine: 3.0L Mileage: 98,000 miles Transmission: Automatic About two months ago, the Service Engine Soon light activated on my 2000 Ford Tau...
2000 Ford Taurus | P03011998 Nissan Maxima P0155 and P0325 Fault Codes: Causes, Diagnosis, and Repair Steps
My 1998 Nissan Maxima is showing both OBD-II diagnostic codes P0155 (O2 Sensor Heater Circuit Malfunction) and P0325 (Knock Sensor Circuit Failure). The vehicle runs normally wi...
1998 Maxima | P0155P1133 OBD2 Code on 1996 Blazer: Fuel/Air Monitoring Issue and Engine Power Loss
I recently purchased a 1996 Chevrolet Blazer with 135,000 miles on the odometer. Since acquisition at 125,000 miles, I've performed multiple maintenance tasks including radiator...
96 Blazer | P1133Practical 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.