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.
2001 Dodge Dakota 5.9L Engine P1762 Fault Code at 119,000 Miles
I'm currently experiencing a P1762 diagnostic trouble code on my 2001 Dodge Dakota with the 5.9L engine, and I've already replaced both the transmission fluid and filter. The co...
2001 Dakota 5.9 | P17621998 Volkswagen Jetta 1.8L Diesel - P0380 Glow Plug Heater Circuit Malfunction Diagnosis
I own a 1998 Volkswagen Jetta 1.8L diesel model with a P0380 diagnostic trouble code indicating a glow plug heater circuit malfunction. Could this be caused by a faulty glow plu...
1998 Volkswagen Jetta 1.8 | P0380P0171 OBD2 Code on 2000 Mazda 626: Causes and Fixes Explained
I own a 2000 Mazda 626 with a 4-cylinder engine and am struggling to diagnose the root cause of an ongoing issue. My OBD-II scanner shows only one fault code: P0171 — 'System To...
Mazda 626 | P01711997 Mazda Protege P0100 and P0170 Error Codes: Causes and Fixes
I own a 1997 Mazda Protege with the check engine light on. The emission-related powertrain diagnostic trouble codes show P0100 (Mass Air Flow Circuit Malfunction) and P0170 (Fue...
97 Mazda Protege | P0100P0174 and P0171 Fault Codes in 1995 Ford Windstar - Check Engine Light, Fuel Smell, Rough Idle
I own a 1995 Ford Windstar that has been displaying a persistent check engine light. I've already replaced the oxygen sensor, fuel filter, and air filter. The vehicle now emits ...
1995 Windstar | P0171P1371 Fault Code on 1996 Chevrolet Impala SS: Causes, Diagnosis, and Fixes
I've been troubleshooting my 1996 Chevrolet Impala SS for weeks to get it running reliably. The most recent diagnostic trouble code I'm seeing is P1371 — 'Ignition Control Modul...
Chevy Impala SS | P1371Ford Fiesta 2004 1.4 Manual - P0103 and P0304 Fault Codes: Misfire and TMAP Sensor Issues
My 2004 Ford Fiesta 1.4 manual, with 40,000 miles, is experiencing a very stuttering engine. The onboard diagnostics show fault code P0103 and a freeze frame indicating P0304 (c...
Ford Fiesta | P0103P0171 and P0174 Diagnosis for 1997 Ford Ranger V6 4.0L: Lean Mixtures, Idle Issues, and Vacuum Leak Solutions
Hi there, My OBD2 scanner shows P0171 (System Too Lean Bank 1) and P0174 (System Too Lean Bank 2) on my 1997 Ford Ranger with a 4.0L V6 engine. The engine runs lean on both int...
97 Ford Ranger V6/4L | P0171Land Rover Discovery II P0171, P0174, P1172, P1175, P0734 Codes: Diagnosis and Fixes
My Land Rover Discovery II is displaying multiple OBD-II diagnostic codes: P0171, P0174, P1172, P1175, and P0736. I've researched the meanings of these codes but am missing spec...
Land Rover | P01712002 Dodge Ram 1500 P0174 Code: Diagnosis and Fixes for Lean Condition on Passenger Side
Hi everyone, My 2002 Dodge Ram 1500 4x4 with a 5.9L V8 engine has started running poorly—experiencing hesitation, especially under acceleration. After about two miles, the chec...
2002 Dodge Ram 1500 | P01742003 Toyota Corolla P0420 Code: Causes, Fixes & TSB Solutions (Aftermarket Converter Failures)
My 2003 Toyota Corolla has reached 140,000 miles and is equipped with a manual transmission. About two and a half years ago, the check engine light came on. I took it to a Toyot...
2003 Corolla | P04201999 VW Passat P0304 Code: Diagnosis After Replacing Plugs and Wires
I own a 1999 Volkswagen Passat that has recently triggered a P0304 diagnostic code. I replaced the spark plugs and ignition wires and reset the system, but within minutes of dri...
vw passat | P0304P0403 on 1997 Dodge Intrepid
I have trouble code P0403 - EGR FLOW CIRCUIT MALFUNCTION on a 1997 Dodge Intrepid, 3.5L engine. I replaced the EGR valve. The new valve came in 2 parts, it included a differenti...
1997 Dodge Intrepid | P0403P0051 on 2000 Mazda MPV
I just purchased a 2000 Mazda MPV, 51000 miles, California 2.5L engine. The engine light came on about 2 weeks weeks after I got it. The trouble code is P0051 - HO2S BANK 2 SENS...
2000 Mazda MPV | P0051P0401 Fault on 2002 Impala 3.4L: How to Diagnose and Fix Insufficient EGR Flow
I recently replaced the EGR valve on my 2002 Impala 3.4L and confirmed there was no blockage in the intake manifold by inserting a 14-gauge house wire into the opening. I also v...
2002 Impala 3.4L | P0401Practical 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.