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.
Ford Escort 1998 P0117 P1117 P1000 Fault: ECT Sensor Issues and Cold Start Problems
Hello everyone, I'm new to this forum and glad I found it. I recently had issues with my 1998 Ford Escort (2.0L SPI engine). After replacing the electric radiator fan, the fan s...
Ford Escort | P01172003 Jeep Liberty P0700 Transmission Control System Malfunction - How to Diagnose and Fix
The check engine light on my 2003 Jeep Liberty has come on, and I recently learned how to retrieve the fault code using an OBD2 scanner. The only code I've found is P0700 — Tran...
2003 Jeep Liberty | P07001998 Mazda Mystique P0153 and P0305 Fault Codes: O2 Sensor Slow Response & Cylinder 5 Misfire
My 1998 Mazda V6 Mystique is showing two diagnostic trouble codes: P0153 (Oxygen Sensor Circuit Slow Response - Bank 2, Sensor 1) and occasionally P0305 (Cylinder #5 Misfire). I...
mystique | P01532005 Intrepid with P0731 and P0432: Gear Ratio and Catalytic Converter Issues Explained
I'm experiencing two diagnostic trouble codes on my 2005 Intrepid: P0731 (Gear 1 ratio incorrect) and P0432 (Main catalytic converter below threshold, Bank 2). Can anyone provid...
Intrepid | P04322000 BMW 323i P1519 Fault Code: VANOS Related Issue and DME Software Update Solution
Looking for accurate information about the P1519 fault code in a 2000 BMW 323i. The code indicates an issue with the manufacturer-controlled vehicle speed, idle control, and aux...
2000 BMW 323 | P15192005 Honda Civic Si P2646 Fault Code: Not in Service Manual? Help Needed
My 2005 Honda Civic Si is not revving past 4,000 RPMs. The vehicle exhibits a persistent issue where the engine fails to accelerate beyond this point. I've checked the service m...
05 Civic Si | P26462002 Mustang GT P0171 and P0174 Codes: Causes and Solutions
I own a 2002 Mustang GT with 61,000 miles and have been consistently receiving P0171 and P0174 diagnostic trouble codes. I've already replaced both the before- and after-oxygen ...
02 Mustang GT | P01711997 Toyota Camry P0401 Code: EGR System Diagnosis and DPFE Sensor Location Guide
I'm currently troubleshooting a 1997 Toyota Camry 4-cylinder automatic with a persistent P0401 diagnostic code. I've already removed and cleaned the EGR valve, confirmed its ope...
97 Toyota Camry | P04011999 Chevrolet Suburban P0430 Diagnosis: O2 Sensor Behavior, Cat Failure, and Universal vs. Direct Replacement Catalytic Converters
I own a 1999 Chevrolet Suburban with 124,000 miles. Recently, it started displaying a persistent P0430 diagnostic trouble code (DTC). I've cleared the code multiple times, but i...
1999 Chevrolet Suburban | P04302002 Duramax 6.6L Diesel Engine P0234 and P1621 Code Issues After Installing Hypertech Power Programmer
I recently purchased a used Hypertech Power Programmer III for my 2002 Duramax 6.6L diesel truck. After installing it at 50HP, the vehicle triggered two diagnostic trouble codes...
2002 6.6L Duramax Diesel | P02342000 GMC 1-Ton Box Van P1345 Code: Diagnosis and Fuel System Issues
I have a 2000 GMC 1-ton box van with 68,000 miles and a 5.7L Vortec engine with an automatic transmission. The check engine light came on and triggered a P1345 code. After havin...
gmc | P1345P0420 Fault on 1998 Honda Accord: Causes and Solutions at 94K Miles
Hi. My 1998 Honda Accord reached approximately 94,000 miles recently, and the Check Engine light has come on with fault code P0420. I previously replaced the catalytic converter...
Accord 98 | P04201997 Isuzu Trooper P0401 Code: EGR System Insufficient Flow - Diagnosis and Fixes
I own a 1997 Isuzu Trooper with a 3.2L engine and am currently experiencing OBD-II fault code P0401, which indicates an insufficient flow in the EGR (Exhaust Gas Recirculation) ...
Isuzu Trooper | P04012000 Ford Focus SE P0171 and P1130 Diagnostic: Sputtering, Slow Acceleration, and O2 Sensor Location Help
I've been experiencing persistent sputtering and slow acceleration in my 2000 Ford Focus SE over the past few weeks. The issue worsens at steady speeds between 40-55 mph, giving...
2000 Ford Focus | P017102 Suburban PO430 Code: Oxygen Sensor or Catalytic Converter Issue?
I'm experiencing a recurring PO430 diagnostic code on my 2002 Suburban. I replaced the oxygen sensor and cleared the code, but it returned within 45 minutes of driving. The truc...
02 Suburban | P04301998 Jeep Cherokee Check Engine Light On: Fixing P0138, P0463, and P0720 Trouble Codes
I own a 1998 Jeep Cherokee and recently had the check engine light come on. After taking it to a mechanic for an OBD II scan, three trouble codes were detected: P0138, P046-3, a...
1998 Jeep Goddess | P01382002 Ford F150 P0401/P0402/P1131/P1151/P0171 Diagnosis: DPFE Sensor, O2 Sensors & Emission Test Failure Fix
I own a 2002 Ford F150 with over 125,000 miles. Due to state emission regulations, vehicles older than two years must undergo annual emissions testing. This vehicle has failed i...
02 F150 | P0171Practical 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.