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.
Ram 1500 (175k miles) running rough with P0300-P0308: Multiple cylinder misfires and intermittent issues
My 2000-2006 Ram 1500 with a 5.2L V8 engine has started running roughly after being smooth for years. The truck recently developed an intermittent misfire issue — the check engi...
Ram 1500 | P03002002 Oldsmobile Silhouette P0446 Code: Evaporative Emission System Issue
Hello, I'm experiencing a P0446 diagnostic trouble code on my 2002 Oldsmobile Silhouette. I've already replaced the fuel tank cap, but the code persists. Any suggestions for fur...
OLDSMOBILE SILHOUETTE | P04462001 Chrysler Neon P0132, P171, and P106 Codes - What Do They Mean? Diagnosing O2 Sensor and MAP Sensor Issues
Hi everyone, I'm currently troubleshooting several check engine light codes on my 2001 Chrysler Neon 1.6 SE. The issues are as follows: - P0132: This code appeared after washin...
Chrysler Neon 2001 | P01351998 Mercury Mystique P1380/P1381 Fault Codes: Emissions Test Failure & Possible Causes
Hi everyone, I own a 1998 Mercury Mystique with a 4-cylinder engine and approximately 22,000 miles. The car runs smoothly under normal conditions, but it fails state emissions t...
98 merc mystique | P1380'02 Kia Spectra P0030/P0134
Anyone have some input for this? Codes were P0030 & P0134 (Bank 1 Sensor 1 Inactivity / O2 heater circuit fault). So I changed the sensor and now get a P0031. (Heater circuit ...
Kia Spectra | P0030P0441 and P0446 Diagnostic Issues on 1999 Toyota Corolla LE - Repair Cost vs DIY Solution
I'm experiencing both diagnostic trouble codes P0441 and P0446 on my 1999 Toyota Corolla LE. The dealership has quoted a repair cost of $400, which I'm concerned about. I'd like...
1999 Toyota Corolla | P0441P0420 Code Reappears After Catalytic Converter Replacement on 2001 Toyota Corolla - O2 Sensor Placement Question
I own a 2001 Toyota Corolla LE with 142,000 miles. Recently, my car failed an emissions inspection due to a P0420 diagnostic trouble code (DTC), indicating a catalytic converter...
Toyota Corolla | P04202000 Chevy S10 2.2L Flex-Fuel P0171 O2 Sensor Issue After E-85 Fuel Use
My 2000 Chevrolet S10 2.2L flex-fuel engine has been throwing code P0171 (System Too Lean) after I used a single tank of E-85 fuel. Previously, the vehicle had codes P0130 and P...
2000 Chevy S10 | P0171Mercedes-Benz C280 1998 Model P0170 and P0173 OBD2 Diagnostic Code Explanation
My 1998 Mercedes-Benz C280 runs smoothly with no noticeable drive issues. However, the vehicle is displaying two diagnostic trouble codes: P0170 (Rich Fuel Mix - Bank 1) and P01...
98 c280 benz | P01702000 Chrysler Grand Voyager V6 (3.3L) with P0171 Code: Hard to Start, Rough Idle and Hesitation - How to Fix?
I own a 2000 Chrysler Grand Voyager with a 3.3L V6 engine, currently at 88,000 miles. The vehicle is experiencing difficulty starting and runs roughly when idling. Once moving, ...
Chrysler | P0171P0303 Diagnostic and Fix for 1997 Chevrolet Lumina 3100 - Spark Plug, Injector, and Compression Issues
I own a 1997 Chevrolet Lumina 3100 that started exhibiting a knocking noise while driving on the highway. Shortly after, the SES light began flashing, which later switched to st...
1997 Chevy Lumina 3100 | P0303How to Fix P0031 Code on 2001 Mazda MPV: Bank 1 Sensor 1 Heat Control Circuit Low Voltage
I own a 2001 Mazda MPV with the check engine light illuminated. The diagnostic trouble code displayed is P0031 — indicating a low voltage issue in the heater circuit of Bank 1, ...
Mazda MPV | P00312000 Ford Focus 2.0L DOHC Misfire Issue: P0302 & P0303 Codes Explained
My 2000 Ford Focus 2.0L DOHC engine frequently misfires when accelerating quickly, but runs smoothly with gradual acceleration. After a recent tune-up that reduced some vibratio...
2000 Focus 2.0L DOHC | P0302P0325 Fault Diagnosis and Location on 1997 Nissan Sentra
Hi everyone, I'm experiencing a P0325 diagnostic trouble code on my 1997 Nissan Sentra, which indicates a malfunctioning knock sensor. I'm having difficulty locating the sensor...
Nissan Sentra | P03251996 Dodge Intrepid 3.3L V6: P0171, P0300, and P0301 Misfire & Emissions Failure - How to Fix?
I recently completed a tune-up and replaced the catalytic converter on my 1996 Dodge Intrepid with a 3.3L V6 engine. The vehicle now shows three diagnostic trouble codes: - P01...
1996 Intrepid | P01711997 Dodge Ram 1500 - P0713 Transmission Fluid Temperature Sensor Issue: Diagnosis and Solutions
I'm experiencing a persistent P0713 fault code on my 1997 Dodge Ram 1500, indicating a high input from the transmission fluid temperature sensor. I've tried multiple troubleshoo...
97 Ram 1500 | P0713Practical 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.