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.
2002 Chevrolet Silverado 4.3L Fault Codes P3401 and P3501 Explained
I own a 2002 Chevrolet Silverado with a 4.3L V6 engine, and I'm currently encountering diagnostic trouble codes P3401 and P3500. Can someone please explain what these codes mean...
2002 Silverado | P3401Mercedes ML450 P0730 Incorrect Gear Ratio Code: Repair Costs for Sensor, Transmission, or Catalytic Converter
I'm experiencing a P0730 code on my Mercedes-Benz ML450, which indicates an incorrect gear ratio. I've already considered changing the transmission fluid, but I want to understa...
Mercedes Benz ML 450 | P07302004 Audi TT P0342 and P0102 Fault Codes After Engine Cut Out and No Start
Hi, I was driving on the M62 at approximately 65 mph when my 2004 Audi TT 180 bhp suddenly lost all power. The vehicle failed to respond, and after being towed, a diagnostic sca...
2004 Audi TT | P01022007 Ford F15-0 Evaporative Emission System Code P0446 - Smog Failure & Engine Stalling Issue
My 2007 Ford F150 with a 5.4L engine is failing smog inspection due to a persistent OBD2 code P0446: Evaporative Emission System Vent Control Circuit. The check engine light was...
2007 Ford F150 | P04462010 VW Jetta TDI Check Engine Light On: How to Fix P0401 Code
Good afternoon. I own a 2010 Volkswagen Jetta TDI, and my check engine light has come on. After visiting an auto parts store, the diagnostic tool returned a P0401 code. What com...
2010 VW Jetta | P04012006 F-150 Remote Starter Installation Causes P0104, P0605, and B1352 Fault Codes - Expert Diagnosis Required
I installed a Viper 7345V remote starter in my 2006 Ford F-150 on February 10, 2016. On February 11, the check engine light activated. I returned to the installer, who stated it...
2006 F-150 | B13522011 GMC Yukon Denali C0585-04 Fault Code: Left Rear Solenoid Circuit Malfunction Diagnosis
The fault code C0585-04 frequently appears on my 2011 GMC Yukon Denali, indicating a left rear solenoid circuit malfunction. My OBD2 scanner confirms this issue, but I'm unsure ...
2011 GMC Yukon Denali | C05852005 Chevrolet Impala 3.4L Engine P0121 Code: Throttle Position Sensor Issue and Hesitation After Replacement
My 2005 Chevrolet Impala with a 3.4L engine has been displaying the P0121 diagnostic trouble code, which indicates an issue with the throttle position sensor (TPS). I replaced t...
2005 impala | P01212000 Mazda Miata P0304 Misfire Diagnosis: Spark Plug, Injector or Mechanical Issue?
My 2000 Mazda Miata has suddenly started misfiring under load. After using an inexpensive OBD-II scanner (Oxgord MS300), I received a DTC P0304 code indicating a cylinder 4 misf...
2000 Mazda Miata | P03042007 Honda Civic Hybrid P0171 - Engine Management Light On, Fuel System Lean
My 2007 Honda Civic Hybrid has triggered the engine management light. The onboard diagnostic system has detected fault code P0171, indicating a lean fuel condition in the fuel s...
Honda Civic hybrid | P0171Renault 1.9dci P0670 Glow Plug Control Circuit/Open Fault - Fix and Cost
Hi, I'm experiencing issues with my Renault 1.9dci diesel engine. The 'Injection Fault' and 'Red Stop' warning lights are frequently coming on, causing the vehicle to enter limp...
Glow plug control circet/open | P0670P0151 Fault on 2003 Mercedes ML350 - O2 Sensor Issue and Symptoms
Hello everyone, My 2003 Mercedes ML350 has started exhibiting unusual behavior about two weeks ago. I was initially advised to replace the Air Flow Meter, which I did — the car...
ML 350 | P01512006 Sedona LX 3.8L - Limp Mode & Blinking CEL: OBD2 Codes 0171, 0174, 0300, 0331 Explained
I recently purchased a 2006 Toyota Sedona LX (3.8L V6) on February 13, 2015, in a cash deal from a dealer for my wife. After driving approximately 100-150 miles with no issues, ...
Sedona LX | P01711998 Ford F150 4.2L V6 - P0430 Code Fluctuates On/Off: Causes & Diagnosis
Hello, I recently purchased a brand-new 1998 Ford F15-0 with a 4.2L V6 engine in Colorado. In 2005, I moved to California and have since driven it over 445,000 miles (all my own...
98 F150 | P04302012 Chevrolet Cruze P0496 Fault Code: Causes and Solutions
I own a 2012 Chevrolet Cruze and am currently experiencing the P0496 diagnostic trouble code. I'm looking for clear, reliable information on what this error means and how to fix...
chevrolet cruze | P04962003 Smart For Two Cabrio Misfire at 2000 RPM with P2019, P201B, P201D, P201F Codes After Engine Rebuild
Hello everyone, After a complete engine rebuild on my 2003 Smart For Two Cabrio Cabrio, I'm experiencing a misfire on cylinder 2 specifically when the engine reaches around 200...
Smart | P2019W163 ML320 2002 - Fault Codes P0720 and P0600: Diagnosis and Sensor Issues
I'm experiencing fault codes P0720 and P0600 on my 2002 W163 ML320. I've already checked and cleaned the sensors, and it appears one of them was replaced previously. Any insight...
w163 ml320 | P0600Practical 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.