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.
1999 Buick Regal P0303 and P0171 Codes: Misfire and Lean Mix Issue After Plug and Injector Replacement
I'm completely stuck with my supercharged 1999 Buick Regal. The vehicle is experiencing a misfire and has stored both P0303 (cylinder 3 misfire) and P0171 (system lean condition...
99 Buick Regal | P01712002 Chevrolet Silverado 4.3L P0341 Camshaft Position Sensor Issue: Code Returns After Replacement
I own a 2002 Chevrolet Silverado with a 4.3L engine and currently have 120,000 miles on it. The vehicle has been exhibiting misfiring symptoms specifically in 4th and 5th gears....
2002 Chevrolet Silverado | P0341P0300 Fault on 1999 Nissan Pathfinder 4x4: Diagnosis and Fix (Solved)
Hello, I recently performed an oil and air filter replacement on my 1999 Nissan Pathfinder 4x4. After starting the engine, the Service Engine Soon (SES) light began flashing. Th...
1999 Nissan Pathfinder | P03002000 Honda CRV B20B Misfire Diagnosis: P0300-P0303 & P0420/P1399 Codes Explained
I own a 2000 Honda CRV with the 2.0L B20B engine. The check engine light is on, and diagnostic scans have revealed six fault codes: P0300, P0301, P0302, P0303, P0420, and P1399....
Honda B20B CRV | P03002003 Jeep Liberty P0340, P1299, P0841, P1391 - Car Stalls After 5-10 Minutes with Fuel Warning
A few days ago, my 2003 Jeep Liberty suddenly stopped running as if it had run out of gas. I connected an OBD2 scanner yesterday and retrieved the following diagnostic trouble c...
2003 Jeep Liberty | P0340P0420 Fault Diagnosis for 2000 Daewoo Nubira: Exhaust Leak Fix and O2 Sensor Check
I own a 2000 Daewoo Nubira sedan and am currently experiencing a P042-0 diagnostic code. After inspecting the vehicle, I identified a loose exhaust pipe, which has now been secu...
2000 Daewoo Nubira | P04202002 Ford Windstar P0171-P0174: Vacuum Leak Diagnosis and Fix After Air Filter Replacement
I replaced the air filter about a month ago. A few days later, my check engine light came on with fault codes P0171 and P0174. Upon inspecting the air filter housing, I found th...
2002 Ford Windstar | P01712001 Chevrolet Cavalier OBD2 Code P0420 Bank 1 4-Cylinder: How to Fix Cat Converter Failure at 120,000 Miles
Hi everyone, I own a 2001 Chevrolet Cavalier with a 2.2L 4-cylinder engine. For the past six months, this vehicle has been failing its NY smog inspection due to OBD2 diagnostic...
2001 Cavalier | P04202001 Nissan Sentra 1.8L P0303 Misfire: Diagnosis and Solutions with Coolant Leak Insight
I'm experiencing a persistent P0303 misfire code on my 2001 Nissan Sentra with the 1.8L QG18DE engine. I've confirmed that cylinder 3 is misfiring, and after swapping the coil p...
2001 Nissan Sentra | P0303How to Recode and De-Immobilize Ford Windstar 2000 with P1260 Theft Code - PATS Module Solution
I am currently working on a 2000 Ford Windstar with the following PCM module details: - Module: PCM - Part Number: YU7AGB - Software Level: BVAJASDHEX - Version Date: 2001 Usi...
Ford Windstar 2000 | P12602004 Ford Explorer 4.0L P0506 - Low Idle and Engine Dies After Startup
My 2004 Ford Explorer with a 4.0L engine has recently developed a starting issue. One morning, the vehicle would not start properly—once it did, the idle was extremely low and t...
2004 Ford Explorer | P05062000 Dodge Cummins P1693 Code: Diagnosis and Solutions for Fuel System Issues
My 2000 Dodge Cummins has been in my family since 2000. I purchased it from my father in 2002 with approximately 40-50,000 miles. Since then, the truck has consistently underper...
2000 dodge cummins | P16932001 Toyota Corolla P0171 - System Too Lean: Diagnosis and Fixes
Hello everyone, I own a 2001 Toyota Corolla with 150,000 miles. The check engine light has come on, and after taking it to AutoZone for diagnostics, I received code P0171 — 'Sy...
2001 T Corolla | P0171PO441 Diagnostic Code in 2005 Chrysler Town & Country: Causes and Dealer Pricing Concerns
In November, my check engine light came on and the dealership advised me that the LDP (Lambda Detection Pump) needed replacement along with a detector. Two weeks later, the warn...
Chrysler T&C | P0441P0305 Diagnostic - Cylinder #5 Misfire in 2003 Ford Mustang GT
I own a 2003 Ford Mustang GT with a 5-speed manual transmission. When I tried to start the engine, it was difficult to turn over, and upon starting, I noticed a strong gasoline ...
2003 GT Mustang | P0305Practical 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.