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.
How to Fix P1443 EVAP System Fault on Mazda B2000 - Failed State Inspection
I'm experiencing a diagnostic code P1443 on my Mazda B2000, and I'm unable to identify the root cause. The vehicle has failed its state inspection due to this issue. Can anyone ...
Mazda B2000 | P144399 Escort ZX2 P0301 code
I have a 1999 Escort ZX2 with the 2.0 L DOHC ztech engine. Every so often the engine will start to run a bit rough for a bit and the check engine come on. The car will run fine ...
99 Escort ZX2 | P03011999 GMC Jimmy P0452 Code: EVAP System Low Sensor Input - Diagnosis and Fixes
I own a 1999 GMC Jimmy with a 4.3L engine, and I'm currently experiencing a P0452 diagnostic code indicating a low evaporative emissions (EVAP) system sensor input. I've already...
99 GMC | P04521999 Chevy Metro P0455 Fault: Causes, Diagnosis, and DIY Solutions
My 1999 Chevrolet Metro with a 3-cylinder engine is triggering DTC P0455, which indicates a gross evaporative emission system (EVAP) leak. I've already replaced the gas cap with...
1999 Chevy Metro | P04551999 Nissan Maxima P0325 and P0400 Fault Codes: Cost Discrepancy Between Service Station and Dealer
I own a 1999 Nissan Maxima with 79,000 miles, an automatic transmission, and a six-cylinder engine. The 'Service Engine Soon' light has activated, and since I'm not technically ...
99 Nissan Maxima | P03252005 Subaru Legacy P0458 Code: Evaporative Emission Control System Purge Control Valve Circuit Low - Diagnosis and Fixes
Hi everyone, I've recently started noticing the Check Engine Light (CEL) coming on along with a flashing cruise control indicator. After scanning the vehicle, I received diagnos...
2005 Subaru Legacy | P0458P0325, P0171, P0302 Diagnosis - 2000 Honda Civic EX Check Engine Light & Slow Crank Issue
I own a 2000 Honda Civic EX and recently noticed my check engine light came on. The OBD-II scanner detected three fault codes: P0325 (Knock Sensor Circuit Malfunction), P0171 (S...
2000 Honda Civic | P0171P0420 Fault Diagnosis: Is It a Catalytic Converter or O2 Sensor in 1998 Honda Civic Coupe?
I recently encountered a P0420 diagnostic code on my 1998 Honda Civic Coupe, and I'm seeking expert opinions to clarify what's actually wrong. The check engine light first appea...
Civic Coupe | P042096 Geo Metro P1502
I have a 96 Geo Metro with the 3 cylinder that is giving P1502 as a trouble code. What does this one mean and what is a likely cause?
96 Geo Metro | P1502Porsche Boxster P1691 Error Code Explanation and Troubleshooting
I'm looking for accurate information about the P1691 diagnostic trouble code in a Porsche Boxster. Can anyone provide a clear explanation of what this error means, its common ca...
Porsche Boxster | P16912004 Ford F-150 P2004 Diagnostic: What It Means and How to Fix It
I have a 2004 Ford F-150 with 47,000 miles, equipped with an automatic transmission and a 4.2L engine. I recently received a P2004 diagnostic code and want to understand what it...
04 ford f-150 | P20041997 GMC K1500 5.0L Random Misfire (P0300) - Lean Condition, High IAC, All Components Replaced
I own a 1997 GMC K1500 with a 5.0L V8 engine and 4x4 drivetrain. The vehicle has been modified only with a cold air intake system (dry cotton filter). Recently, it's consistentl...
1997 | P0300P1514 Fault Code: Airflow to TP Sensor Correlation High (SES) - Common in Vehicles After MAF Tuning
I recently encountered fault code P1514: 'Airflow to TP Sensor Correlation High' under SES (Service Engine Soon) mode. This issue appeared only after I performed a MAF (Mass Air...
Unknown | P1514PO420 Fault Code on 2002 Chevrolet Avalanche - Catalyst System Efficiency Below Threshold (Bank 1)
I have a 2002 Chevrolet Avalanche that is triggering a PO420 diagnostic code, indicating catalyst system efficiency below threshold for Bank 1. The issue is related to the oxyge...
02 Avalanche | P0420P1128 DTC: Long Term Fuel Trim B1 System Too Lean on 1999 VW Bug 2.0L - NOX Emissions at 59ppm Over Limit
My daughter's 1999 VW Bug with a 2.0L engine has approximately 140,000 kilometers on the odometer. A recent full tune-up was completed, including replacement of the first oxygen...
VW Bug | P1128Chevy Astro P0300 Misfire Diagnosis: EGR Valve and Intake Gasket Considerations
I recently removed the left bank upstream oxygen sensor, but the issue persists—once the engine reaches idle around 600 RPM, cylinder #1 begins misfiring. I previously inspected...
Chevy Astro | P03001999 Honda Odyssey P1259 - VTEC System Malfunction Diagnosis and Repair Guide
I own a 1999 Honda Odyssey and am currently encountering a P1259 fault code, indicating a VTEC system malfunction. As a Ford V8 enthusiast, I have limited experience with Honda ...
99 Honda Odyssey | P1259VW Cabrio 2001 2.0L with P0102 and P1476 Fault - Need Expert Advice on Sensor Repair or Replacement?
Hi everyone, I recently purchased a 2001 VW Cabrio (2.0L engine) and have been using it for just one week. Unfortunately, the car broke down suddenly with the orange engine war...
VW Cabrio | P0102Practical 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.