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 Blazer 4x4 P0740 P0745 and P1860 Codes: Causes and Fixes After 4WD Use
I own a 1999 Blazer 4x4, and today while using 4WD to back up onto my slippery driveway into the garage, the engine light came on. I used an OBD2 scanner and retrieved codes P07...
99 Blazer | P0740P0453 Fault Code on 1998 Ford Ranger 2WD: Diagnosis and Solutions
Hi everyone, I'm currently dealing with a P0453 diagnostic trouble code on my 1998 Ford Ranger 2WD with a 2.5-liter engine. I've already replaced the fuel tank pressure sensor,...
Ford Ranger | P04531997 Honda Civic DX: P0135, P0141, P0501, P0700, P0720 Codes Appearing Simultaneously - O2 Sensor & Speed Sensor Issues
I own a 1997 Honda Civic DX with a 1.6L engine and automatic transmission. Recently, all the following diagnostic trouble codes appeared at once while driving: P0135, P0141, P05...
1997 Civic | P0135P0171 P0420 P0430 Fault Diagnosis - 2003 Ford Expedition 4.6L 2WD with Idle Drop and Power Loss
My 2003 Ford Expedition 4.6L 2WD engine runs smoothly when cold, idling at approximately 1000 RPM. However, as the engine warms up, the idle drops to around 700 RPM. Under light...
03 Ford Expedition | P0171P0137 O2 Sensor Fault on 2002 Chevy Tahoe: Diagnosis and Fix
I recently encountered a P0137 diagnostic trouble code on my 2002 Chevrolet Tahoe. I replaced both the oxygen sensors—one before and one after the catalytic converter—on the rig...
2002 Chevy Tahoe | P0137OBD2 Fault Code P1354 on 2001 Lexus LS430: How Difficult Is It to Replace the VVT Actuator?
I am currently working on a 2001 Lexus LS430 and have detected OBD2 fault code P1354. I want to know how difficult it is to replace the Variable Valve Timing (VVT) actuator. The...
2001 Lexus LS430 | P13542005 Jeep Liberty Diesel - Fault Code P1263: Glow Plug #2 Control Circuit Issue
My 2005 Jeep Liberty diesel engine is displaying fault code P1263, which I've identified as related to glow plug #2. After reviewing the diagnostic charts, I noticed that both P...
2005 Jeep Liberty Diesel | P1263P1345 Diagnostic and Rotor Alignment Fix for 1998 S10 4.3L V6
For owners of a 1998 Chevrolet S10 with a 4.3L V6 engine experiencing fault code P1345, proper rotor alignment is critical. The rotor must be positioned so that it points to the...
S10 4.3L | P13452001 Toyota Avalon P0300, P0302, P0304, P0306 Misfire Diagnosis - V6 Engine with Rough Idle and Intermittent Misfires
I own a 2001 Toyota Avalon with 150,000 miles featuring a 3.0L V6 engine. The vehicle exhibits a rough idle and intermittent misfiring—sometimes running smoothly, other times fa...
Toyota Avalon | P03001998 Chevy K-1500 Random Cylinder Misfire: PO300, PO151, PO453 - EGR Valve Impact & O2 Sensor Issues
I own a 1998 Chevrolet K-1500 with 175,000 miles. The truck is currently displaying three diagnostic trouble codes: PO300 (random cylinder misfire), PO151 (oxygen sensor bank 1,...
98 Chevy K-1500 | P0121P0325 and P0440 Fault Codes in 1998 Mercury Villager: What Do They Mean and How to Diagnose?
I recently encountered two diagnostic trouble codes, P0325 and P044-0, on my 1998 Mercury Villager after hearing a loud bang while driving. The vehicle is currently running smoo...
1998 mercury villager | P03252006 Ford Expedition 5.4L Fault Codes P0121, P2104, and P2112: Diagnosis and Fixes
My friend recently encountered three diagnostic trouble codes on their 2006 Ford Expedition with a 5.4L engine: P0121, P2104, and P2119. The vehicle has accumulated 92,072 miles...
2006 Ford Expedition | P01212008 Hyundai Santa Fe PO464 Fuel System Issue: No Fuel on One Tank Side
My 2008 Hyundai Santa Fe with a 3.3-liter engine is showing fault code PO464. I've already checked both fuel floats and confirmed they are functioning properly using a multimete...
hyundai santa fe | P04642001 Sable 24 Valve Duretec P0302 Cylinder 2 Misfire - Idle Issues and Diagnosis
My 2001 Sable with the 24-valve Duretec engine runs smoothly on highways but struggles to idle consistently. It occasionally idles perfectly, yet most of the time it's unstable....
2001 Sable | P03022001 GMC Jimmy PO305 DTC: Rough Idle, Poor Fuel Economy and Exhaust Smell After Fuel Pump Replacement
My 2001 GMC Jimmy with 162,000 miles and a 4-door 4WD configuration has recently developed a persistent engine misfire indicated by the PO305 diagnostic trouble code. The vehicl...
2001 GMC Jimmy | P03052003 Mazda MPV P0300 P0151 P0171 Diagnosis: Misfires, Lean Codes, and EGR Valve Issues
Hi everyone, new user here and just starting to learn about OBD-II code meanings. My 2003 Mazda MPV (189,000 km) has recently triggered several trouble codes: P0300 (multiple mi...
2003 Mazda MPV | P0151P1345 '98 S10 4.3L
Just changed plugs, wires, cap, rotor, and distributor. Made sure that rotor and distributor were lined up the same way as they came out when i put the new ones in. Went to sta...
S10 4.3L | P13452001 Dodge Dakota 4.7L Engine P0308 Misfire Code - Diagnosis and Solutions
My 2001 Dodge Dakota with a 4.7L engine is showing a definite misfire, indicated by the P0308 diagnostic trouble code. I've already replaced the ignition modules with no improve...
Dakota | P0308Practical 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.