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.
1999 Isuzu Rodeo 3.2L DHOC Fault Code P1860 - TCC PWM Solenoid Circuit Location and Diagnosis
I have a 1999 Isuzu Rodeo 2WD with a 3.2L diesel engine (DHOC) that is throwing fault code P1860. Can anyone explain what the TCC PWM Solenoid Circuit is, where exactly it's loc...
1999 Isuzu Rodeo | P18602003 Chevrolet Trailblazer 5.3L P0300 Code: Hard Missfire, Rough Idle, and Coil Pack Diagnosis
Hi everyone, I'm experiencing a serious issue with my 2003 Chevrolet Trailblazer 5.3L engine. The vehicle is throwing a P0300 random misfire code, resulting in noticeable power ...
2003 Trailblazer | P03002003 Toyota Prius OBDII Codes P0440, P0441, and P0446 - What Do They Mean?
We own a 2003 Toyota Prius with 106,000 miles and the Check Engine Light is currently on. The OBDII scan reveals three EVAP system-related codes: P0440, P0441, and P0446. Are th...
03 PRIUS | P2177PO1351 Diagnostic Help for 1995 GMC Jimmy
I'm looking for help diagnosing fault code PO1351 on my 1995 GMC Jimmy. Can anyone provide guidance on what this code might indicate and how to troubleshoot it effectively?
GMC | P0135warm up catalist insufficent in bank 1 P0421
I have a 2006 mitsubishi lancer es and i keep getting this trouble code that pops up. I am not sure if it is powertrain or what it is but no one locally can tell me what it even...
unknown | P04212003 Audi A6 Quattro P0421 Code Diagnosis: What It Means and How to Fix It
I'm looking for help diagnosing a P0421 code on my 2003 Audi A6 Quattro 3.0. The car runs smoothly, but I'm concerned about continuing to drive with the Check Engine light on. I...
2003 Audi A6 | P0421P1336 Fault Code on 2005 Ford Freestar: Causes and Solutions
How to diagnose and resolve the P1336 fault code in a 2005 Ford Freestar. The P1336 code indicates that the input signal from the crankshaft position (CKP) and/or camshaft posit...
2005 Ford Freestar | P133603 grand am. loud knocking from upper intake. code P0306
Never had trouble before just hit 100k. I was at a stop light and a sudden knock came out real loud. I parked it and had it scanned and I got a code p0306. I replaced the wire, ...
03 Grand Am | P03061999 GMC Suburban P1345 Code: Timing Issue Diagnosis and Fix
I'm encountering trouble code P1345 on my 1999 GMC Suburban. I understand this relates to the engine timing, but I'd like to know exactly what steps I should take to diagnose an...
99 gmc suburban | P13452000 Chrysler Sebring LX 2.5 P0112 Fault: Is the Air Intake Temperature Sensor Really the Issue?
I own a 2000 Chrysler Sebring LX 2.5 with perfect engine performance, but it's consistently displaying fault code P0112 — indicating a low voltage issue in the air intake temper...
2000 Sebring | P01122003 Dodge Neon P0440 Fault Code: Causes and Solutions
I recently received a P0440 diagnostic code on my 2003 Dodge Neon. I initially replaced the gas cap, which cleared the code temporarily. However, after restarting the vehicle, t...
2003 Dodge Neon | P0440Ford F150 SuperCrew P0308 Problems
Can somebody please help?!?! I have an 01 F150 4.6 SuperCrew that has popped a P0308 code. I have already changed out all the plugs and the COP on Cyl 8 treated the fuel and cha...
Ford F150 SuperCrew | P03082003 Lexus ES300 Bank 1 Sensor 1 Air/Fuel Ratio Sensor Location and Replacement Difficulty
Our local Lexus dealer has diagnosed a faulty Bank 1 Sensor 1 Air/Fuel ratio sensor on our 2000 Lexus ES300 and is charging a high price for replacement. Can anyone confirm the ...
2003 Lexus ES300 | P2177Ford P0125 Code in 1998 Ford Windstar: Causes and Solutions
I own a 1998 Ford Windstar that is displaying the P0125 diagnostic trouble code. The code indicates 'Fuel Coolant Temperature Sensor - Closed Loop Insufficient Coolant Temperatu...
ford | P01251997 GMC Safari P0420 Fault: Catalytic Converter Replacement Needed? O2 Sensor Test IDs $70 & $71 Explained
My 1997 GMC Safari with a 4.3L V6 engine and single exhaust system has triggered a P0420 diagnostic trouble code (DTC), indicating low catalyst efficiency in Bank 1. The post-ca...
1997 GMC SAFARI | P04201996 Chevy Suburban P0174 Code: Rough Idle and Starting Issues in Cold Weather
Hi everyone, I'm a new member and I'm currently troubleshooting my 1996 Chevrolet Suburban C2500 7.4L (454 engine). The vehicle is throwing a P0174 diagnostic trouble code, indi...
1996 Chevy Suburban | P0174P0304 Fault in 2001 Jetta 1.8T: Engine Stumbles on Acceleration, Spark Plugs & Coil Pack Diagnosis
I'm experiencing a P0304 diagnostic trouble code on my 2001 Jetta 1.8T, which causes the engine to stumble during acceleration. The issue does not occur when the vehicle is in n...
2001 Jetta 1.8t | P0304Practical 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.