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.
Intermittent P0301 Code in 1996 Ford Mountaineer: Diagnosis and Solutions
I own a 1996 Ford Mountaineer that intermittently displays fault code P0301. The vehicle runs smoothly for periods of time, but then suddenly begins to misfire—showing symptoms ...
Unknown | P03012005 Hyundai Tucson P1491 Code: Meaning and Diagnosis - Running Fine but Code Detected
I recently received a P1491 diagnostic code from my 2005 Hyundai Tucson, but the definition is showing as 'definition not found' when I attempt to read it. The vehicle appears t...
2005 Hyundai Tucson | P14911999 Ford E150 5.4L Engine P0307 Code: Spark Plug and Coil Replacement Not Resolving Issue
I recently encountered a P0307 diagnostic trouble code on my 1999 Ford E150 with a 5.4L V8 engine. I have already replaced all spark plugs and the number seven coil pack, yet th...
1999 Ford E150 | P0307Ford F150 2005 Code PO405: Is It a DPFE Sensor Fault?
My 2005 Ford F150 is displaying Diagnostic Trouble Code (DTC) PO405. I'm wondering if this code specifically points to a failure of the Diesel Particulate Filter Emission (DPFE)...
Ford F150 | P0405Audi A4 2.8 1996 - Troubleshooting P1201, P1203, P1204, P1205, P1206 and P0401 Fault Codes with Misfire at 1500-2000 RPM
I recently encountered multiple fault codes on my 1996 Audi A4 2.8: P1201, P1202, P1203, P1204, P1205, P1206, and P0401. The vehicle exhibits a misfire between 1500 and 2000 RPM...
Audi | P12011999 Astro Van P0172 and P0175 Codes: Fuel Pressure, MAF, and EGR Issues Explained
I recently purchased a 1999 Chevrolet Astro with 190,000 miles on the odometer. During my test drive, no diagnostic trouble codes (DTCs) were present, but the engine exhibited r...
99 Astro | P0172P0431 Fault Code Explanation for 2001 VW Passat GLS Sedan
I recently purchased a 2001 Volkswagen Passat GLS Sedan with a V6 engine and automatic transmission, on August 10, 2010. Yesterday, my check engine light activated, and after ta...
2001 VW Passat | P04311999 Nissan Frontier XE P0100 MAF Sensor Fault: RPM Drop & Engine Stalling Fix
I'm troubleshooting my 1999 Nissan Frontier XE (4-cylinder, 2.4L, 205k miles) with a persistent check engine light showing code P0100 — Mass Air Flow (MAF) Circuit Malfunction. ...
99 NISSAN FRONTIER | P0100P0100 Fault Code in 1996 Mitsubishi Mirage 1.5L Engine - No Mass Air Flow Sensor?
I own a 1996 Mitsubishi Mirage with a 1.5-liter engine that has triggered the P0100 diagnostic trouble code. I understand that P0100 typically indicates a mass air flow (MAF) se...
mirage 1.5 | P01002010 GMC Acadia 3.6L V6 FWD: P0051 and P0052 O2 Sensor Heater Circuit Faults
I own a 2010 GMC Acadia with a 3.6L V6 engine and front-wheel drive (FWD). My vehicle is currently displaying two diagnostic trouble codes: P0051 and P0052. - P0051: Oxygen (A/...
2010 GMC Acadia | P00512006 Chevrolet Trailblazer LS 4.2L I6L: P0506 Code
I have a Chevrolet Trailblazer LS 4.2L I6, 4WD with a P0506 Code P0506 - Idle Air Control System RPM Lower Than Expected http://www.obd-codes.com/p0506 Please help. Thank you Joe
2006 Chevrolet Trailblazer LS 4.2L I6L | P0506VW Caddy 2005 2.0 SDI Diesel - P1440 EGR Valve Power Stage Open Circuit Diagnosis
Vehicle: VW Caddy Van Year: 2005 Engine: 2.0L SDI Diesel Mileage: 101,000 miles The exhaust fault light has come on. After investigation, the issue was traced to the EGR system...
VW Caddy | P1440P0441 OBD2 Code and Fuel Intake Cleaning: Causes and Fixes for 2006 Toyota Corolla
Hi everyone, I own a 2006 Toyota Corolla S. Last week, the Check Engine Light came on, so I took it to the dealership. They diagnosed an ECM failure and replaced it under warra...
2006 Toyota Corolla | P04412005 Nissan Frontier P1124 and P0507 Codes: Idle Issues and Throttle Control Problems
My 2005 Nissan Frontier is displaying two diagnostic trouble codes: P1124 and P0507. Both are related to the throttle control relay and RPM regulation systems. When the service ...
Nissan Frontier | P0507OBD P0320 Fault Diagnosis: Crankshaft Position Sensor Issue on 2005 Hyundai Santa Fe
I'm seeking help diagnosing a P0320 'Ignition/Distributor Engine Speed Input Circuit Malfunction' on my 2005 Hyundai Santa Fe. The vehicle has a 2.4L front-wheel-drive engine wi...
Hyundai Santa Fe | P0320Practical 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.