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.
2001 Ford Taurus P0301 and P0420: Diagnosing Misfire and Catalytic Converter Efficiency Issues
I recently purchased a 2001 Ford Taurus with a 3.0L OHV engine (non-flex-fuel). The vehicle has approximately 188,000 miles on the odometer, and I have limited knowledge of its ...
2001 Taurus | P0301Volkswagen Jetta 2002 P0420 Code: Causes, Symptoms, and Fixes - Diagnosing Catalytic Converter Issues
Hi everyone, this is my first post on the forum — I'm hoping for some guidance with a recurring issue on my 2002 Volkswagen Jetta 2.0L engine. Recently, I've been getting error ...
Volkswagen Jetta | P04201996 Toyota Camry P0420 Code: Is It Related to Griffin iTrip Device?
Hello everyone, I'm currently troubleshooting my 1996 Toyota Camry that has triggered a Check Engine Light and displayed Diagnostic Trouble Code P0420 — Catalyst Efficiency Belo...
96 Toyota Camry | P04201996 Chevrolet Lumina P1870 Fault Code: What It Means and How to Fix It
I recently received a P1870 diagnostic code on my 1996 Chevrolet Lumina. What does this error mean, and what are the common causes? The code appears to be related to transmissio...
96 Lumina | P18702002 Dodge Cummins P0216 Code: Intermittent Power Loss and Fuel Circuit Issues
Experiencing intermittent loss of engine power on my 2002 Dodge Cummins. The vehicle is showing a P0216 diagnostic trouble code, which is specific to the 21st PCM (Powertrain Co...
02 Dodge Cummins | P0216P0120 Fault Code on 2002 Toyota Tacoma: TPS Wiring Issue Diagnosis
I've been researching the P0120 fault code for my 2002 Toyota Tacoma, and according to the service manual, the Throttle Position Sensor (TPS) should have four wires: E2, VTA2, V...
02 tacoma | P0120P0304 and P0430 Misfire and Catalytic Converter Issue on 1996 Ford Taurus
I'm experiencing an intermittent misfire in cylinder #4, followed by a Bank 2 catalytic converter inefficiency (code P0430). The check engine light blinks initially, then stays ...
1996 Taurus | P03041997 Ford Ranger Fault Codes P0153, P0171, P0172, P0401, P1443, P0302: Diagnosis and Fixes
I'm experiencing multiple OBD-II fault codes on my 1997 Ford Ranger: P0153, P0171, P0172, P-0401, P1443, and P0302. I need guidance on where to start troubleshooting. - P0153: ...
1997 Ford Ranger | P01531999 Dodge Durango 4x4 5.2L: PO132, PO135, PO141, PO720 Fault Codes & Transmission Not Shifting into High Gear
My 1999 Dodge Durango 4x4 with a 5.2L engine is showing multiple OBD-II fault codes: PO132, PO135, PO141, and PO720. Suddenly, the transmission will not shift into high gear—no ...
1999 dodge durango 4x4 5.2 | P072096 Dodge Intrepid 3.5L P0171 Code: Rich Running, Black Smoke, and Fuel Trim Issues
Jeff, I own a 1996 Dodge Intrepid with the 3.5L engine that is exhibiting a persistent P0171 code indicating a lean mixture condition — but in reality, the vehicle runs very ric...
96 Dodge Intrepid | P01712003 Chevrolet Express 3500 6.0L - P0101 Code: Rough Idle in Cold Weather, MAF Cleaning Not Resolved
Hello, I own a 2003 Chevrolet Express 3500 6.0L diesel with 180,000 miles and has been well maintained. The issue I'm experiencing is that when the vehicle starts in cold weat...
03 chevy express | P01012000 Dodge Dakota 4.7L with O171 Code: Poor Fuel Economy and Foul Exhaust Smell
My 2000 Dodge Dakota with a 4.7L engine has recently experienced a significant drop in fuel efficiency—down by 25%—despite having 95,000 miles on the odometer. The vehicle now a...
2000 Dodge Dakota | P0171Lexus RX300 Trouble Code B1421: Solar Sensor Circuit Issue and Irregular Idle Problems
I'm experiencing irregular engine idling and occasional stalling in my Lexus RX300, which occurs intermittently and not consistently. I've already replaced the throttle position...
LEXUS RX300 | B1421Eclipse Vehicle P1600 Fault: Serial Communication Failure Leading to Transmission Limp Mode
My Eclipse is displaying fault code P1600 — Serial Communication Link Failure between the ECM and TCU. As a result, the transmission remains stuck in third gear in limp mode. I ...
Mit Eclipse | P1600Mazda 3 2004 P2229 Code: What Does It Mean and How to Fix It?
I recently received a P2229 diagnostic code on my 2004 Mazda 3, and I'm unable to find clear information about what this means. The code indicates a high input in the barometric...
mazda 3 | P2229Practical 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.