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.
1996 Ford Ranger P0302 Code: Rough Idle After Cool Down, Solutions & Diagnostics
I own a 1996 Ford Ranger 3.0L automatic 2WD with over 215,000 miles. The vehicle starts smoothly and runs fine during normal driving conditions. It reaches operating temperature...
Ford Ranger | P03022002 Chrysler Neon 1.6i Frequently Enters Limp Mode with P0140, P0106, and P2135 Error Codes
I own a 2002 Chrysler Neon 1.6i (European model) with approximately 106,000 kilometers. Recently, the vehicle has started entering limp mode more frequently—characterized by a b...
2002 Chrysler Neon 1.6i | P01062001 Duramax Diesel Misfire on Cylinder 6: Diagnosing No Smoke, Codes 0306, 0380, 0004, and 4800
I'm experiencing multiple diagnostic codes on my 2001 Duramax 2500 HD with Allison transmission, crew cab, 4x4. The codes displayed are 0306 (Cylinder 6 misfire), 0380 (fuel sys...
2001 Duramax | P03061996 Mercury Cougar P0420 P0430 P1443 Emissions Failure - How to Fix Without Replacing Catalytic Converters?
My 1996 Mercury Cougar is failing emissions inspection due to fault codes P1443, P0420, and P0430. The emissions tester claims the catalytic converters are clogged, but replacin...
1996 Mercury Cougar | P0420P0300 Code on 2004 Mazda 6i: Causes, Diagnostics, and Fixes for Random Misfires
I own a 2004 Mazda 6i with a 2.3L engine and automatic transmission. Recently, I've been consistently receiving the P0300 diagnostic trouble code indicating random misfires. Des...
Mazda 6i | P03001999 Acura RL P0151, P0150, P0173, P0174 OBD2 Codes - Diagnosis and Fixes
Hi, I own a 1999 Acura RL 3.5L with recent OBD2 trouble codes: P0151, P0150, P0173, and P017-than. Despite these codes, the car runs smoothly and performs well under normal cond...
1999 Acura RL | P01502007 Ford F150 4.6L Triton V8 - P0132 and P2196: Diagnosing O2 Sensor Issues and Transient Rich Conditions
I recently began diagnosing a recurring issue on my 2007 Ford F150 with the 4.6L Triton V8 engine, which has triggered two diagnostic trouble codes: P0132 (O2 Sensor Bank 1 Sens...
2007 Ford F150 4.6L Triton V8 | P0132P0141 O2 Sensor Heater Circuit Error - How to Fix on 2004 Yukon Denali XL with 6.0L Vortec Engine
I'm experiencing a P0141 O2 sensor heater circuit fault (Bank 1, Sensor 2) on my 2004 Yukon Denali XL AWD equipped with the 6.0L Vortec engine. I'd like to know how many oxygen ...
2004 Yukon Denal XL | P0141P1391 Fault Code on 2000 Jeep Cherokee: Common Causes and Solutions
I'm experiencing a P139-1 diagnostic code on my 2000 Jeep Cherokee. I've reset the Check Engine light using an OBD II scanner, but the warning returns shortly after. What are th...
2000 Jeep Cherokee | P1391P1151 and P0133 Fault Codes in 1999 Ford Explorer 4.0L OHV - Causes and Diagnosis
I own a 1999 Ford Explorer with a 4.0L OHV engine and automatic transmission. After extensive research, I've found that the combination of fault codes P1151 and P0136 is relativ...
1999 Explorer | P0133P0251 DTC in 2003 Ford Mondeo TDCI: No Start After Injector R&R and Recoding
My 2003 Ford Mondeo 2.0L TDCI (Delphi injection system) has developed a no-start issue after I performed an injector removal and recoding using Snap-On Verdict. The vehicle has ...
Mondeo | P02511998 Chevrolet Silverado Z71 P0435: Bank 2 O2 Sensor Location and Code Persistence Explained
I recently received a diagnostic code P0435 on my 1998 Chevrolet Silverado Z71. AutoZone confirmed that the issue is related to the oxygen sensor in bank 2, located on the passe...
1998 Chev Silverado Z71 | P0435Toyota Celica P1349 Check Engine Light: VVT System Fault Diagnosis
Encountering fault code P1349 on a Toyota Celica indicates an issue with the Variable Valve Timing (VVT) system. This diagnostic trouble code is commonly associated with problem...
Toyota | P1349Kia Sportage P0501 and P0700 Fault Codes: Diagnosis and Transmission Shift Issues
I have a 2008 Kia Sportage with V6 engine that is showing fault codes P0501 and P0700. After clearing the codes, the transmission shifts normally during initial operation but fa...
Kia Sportage | P05012001 VW Jetta 2.0L Non-Turbo: Fault Code P1256 Explained and Fix
My 2001 VW Jetta GLS with a 2.0L non-turbo, 4-cylinder engine (165,000 miles) is throwing fault code P1256. What does this mean? The car runs fine otherwise. I'm looking for cl...
2001 VW Jetta 2.0 L | P12562005 Chevrolet Tahoe Z71 P0327 Code: Rear Knock Sensor Failure and Repair Steps
I recently purchased a 2005 Chevrolet Tahoe Z71 with a 5.3L V8 engine and 2WD configuration. The vehicle is now displaying a persistent P0327 diagnostic trouble code, indicating...
2005 Tahoe Z71 | P03272001 Toyota Celica GT P0440 Code: Causes and Cheapest Fix
My son has a 2001 Toyota Celica GT with a check engine light triggered by fault code P0440. We recently replaced the gas cap, but the check engine light returns after resetting ...
2001 Celica GT | P04402009 Bentley Azure P0512 Fault: Starter Request Circuit Issue
I own a 2009 Bentley Azure and am currently experiencing fault code P0512, which indicates a problem with the starter request circuit. I have already replaced all spark plugs, c...
2009 Bentley Azure | P05122000 Hyundai Tiburon P0422 - Main Catalyst Below Threshold: Solutions Without Replacing the Converter
Looking for troubleshooting tips beyond simply replacing the catalytic converter. The vehicle shows OBD2 code P0422 indicating 'Main Catalytic Converter Efficiency Below Thresho...
2000 Hyundai Tiburon | P0422Practical 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.