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 windstar lean codes both sides and misfires
getting lean codes both sides and getting misfires 2 cylinders 1 on each side what could possibly be wrong was told try gas filter
2001 ford windstar | P0300P0301 Misfire Diagnosis on 1997 Geo Metro with 1.3L Engine - No Visible Misfires, Code Persists After Timing Adjustment
I own a 1997 Geo Metro with a 1.3L engine that has recently developed a P0301 misfire code. The vehicle runs smoothly under all conditions—no rough idle, no visible misfires dur...
Geo Metro | P0301How to Fix P0420 and P0507 Codes on 2003 Nissan Altima 2.5L: Vacuum Leak vs Catalytic Converter Failure
My 2003 Nissan Altima 2.5L has been showing a check engine light, and after testing at AutoZone, I received two trouble codes: P0420 and P0507. P0420 - Catalytic Converter Effi...
2003 Nissan Altima | P04202000 Toyota TROOPER 3.5L Engine Code PO128 - Sensor or Thermostat Issue?
I've reviewed the reference tables for my 2000 Toyota TROOPER with a 3.5L engine, but I can't locate any information about fault code PO128. The AutoZone technician suggested th...
2000 TROOPER 3.5L | P01282001 Chevy Blazer 4.3L Check Engine Light: MAF and VAF Fault Code Recurrence
I own a 2001 Chevrolet Blazer with a 4.3L engine and have reached 111,000 miles. Recently, the check engine light activated unexpectedly. I took it to Advance Auto Parts for dia...
2001 Chevy Blazer | P21771999 Mercedes E250 with P1401, P0401, and P0402 EGR Fault Codes - Need Diagnosis
I'm experiencing persistent EGR-related fault codes on my 1999 Mercedes-Benz E250: P1401, P0401, and P0402. I've already checked the basic components and can't identify the root...
99 E250 | P2177P0420 Code on 2000 Toyota Corolla: Is the Catalytic Converter Really Faulty? A Real-World Diagnosis
Hello everyone, This is my first post in this community, and I'm sharing a real-life experience with a common issue that many owners of older Toyota Corollas face — the P0420 d...
Unknown | P0420P0402 Fault Code on Ford T-Bird: Excessive Gas Recirculation - Is It EGR or DPFE?
I recently encountered fault code P0402 on my Ford T-Bird, which indicates excessive gas recirculation. This code typically points to issues with the Exhaust Gas Recirculation (...
ford t-bird | P04022000 Jeep Grand Cherokee P1494 Fault: How to Diagnose and Locate Leak Detection Pump Issue
I'm experiencing a P1494 diagnostic code on my 2000 Jeep Grand Cherokee. Can anyone advise what components to inspect and where I can locate the leak detection pump? Detailed gu...
2000 Jeep Grand Cherokee | P14942000 Jeep Grand Cherokee P0181, P076-5, P0434: Diagnosis & Solutions for Common OBD-II Codes
A colleague from work brought his 2000 Jeep Grand Cherokee to the shop yesterday with a check engine light on. Initially, my cheap MAC OBD-II scanner only detected code P1494. H...
2000 Jeep Grand Cherokee | P0181P0455 Fault Diagnosis and Repair for 2006 Ford Ranger - Evaporative Emission System
I own a 2006 Ford Ranger and am consistently receiving the P045-5 diagnostic trouble code. I've already replaced the gas cap and the vapor canister valve, and I've thoroughly in...
06 ford ranger | P04552000 Ford Windstar P0734 Fault: Overdrive Not Engaging and O/D Light Flashing
I own a 2000 Ford Windstar with 130,000 miles. The overdrive (O/D) light is flashing, and the Powertrain Control Module (PCM) has detected fault code P0734, preventing the vehic...
2000 Windstar | P0734Ford Explorer 96 Model P1132 and P1152 O2 Sensor Fault Codes - Need Help Diagnosing
I recently received O2 sensor-related trouble codes PO155, P0141, and P0135 on my 1996 Ford Explorer with approximately 117,000 miles. While it's uncommon for three O2 sensors t...
Ford Explorer | P11322002 GMC Sierra 4.3L P0446 P0443
I have a 2002 GMC Sierra with a 4.3L Vortec and 32K miles on it. It sets the P0446 code about every 3 months or so, pretty much like clock work. I have the Haynes manual bought ...
2002 GMC Sierra | P0443P0011 Fault on 2001 VW Jetta Wolfsburg: How to Fix Camshaft Position or Timing Issues
I'm experiencing a P0011 diagnostic code on my wife's 2001 Volkswagen Jetta (Wolfsburg model). I'd like to know the best steps to diagnose and repair this issue. Specifically, i...
1.8t Jetta | P00111997 VW Golf P1613 Fault Code: Short to B+ - Battery or Wiring Issue?
My 1997 VW Golf runs fine under normal conditions, but suddenly shuts off unexpectedly. The check engine light triggers a fault code P1613, which indicates a short to battery po...
1997 vw golf | P1613Nissan Altima GXE P0100 Code: Causes, Fixes, and Whether It's Worth Fixing at 110,000 Miles
I own a 2001 Nissan Altima GXE that was purchased in 2005 with 75,000 miles. The vehicle has now reached approximately 110,000 miles. I perform regular oil changes every three m...
Nissan Altima GXE | P01001996 Tahoe P0300 and P0430 Codes: Diagnosis and Fixes After Multiple Repairs
I'm looking for help with my 1996 Chevrolet Tahoe that's showing both P0300 (random misfire) and P043-0 (catalyst system efficiency below threshold) fault codes. I've already re...
96 tahoe | P0300P1391 OBD2 Diagnostic Code in 2000 Dodge Grand Caravan: What Part Is Needed?
I'm experiencing a P139-1 diagnostic trouble code on my 2000 Dodge Grand Caravan, and I believe this is the root cause of the vehicle's performance issues. After researching onl...
2000 Dodge Grand Caravan | P1391Practical 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.