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.
P0171 & P0174 Fault Diagnosis on 1996 Mercury Sable 3.0L DOHC - After Fuel Pump and Filter Replacement
I own a 1996 Mercury Sable 3.0L V6 DOHC with approximately 109,500 miles. Recently, I encountered persistent check engine light issues along with driving symptoms after replacin...
96 Mercury Sable 3.0 DOHC | P01712003 Dodge Ram 2500 Cummins Fault Codes P0204 and P2149: Injector Circuit Malfunction and Supply Voltage Open
I own a 2003 Dodge Ram 2500 with a Cummins engine, and I'm experiencing rough idle and lack of power. The onboard diagnostic system has triggered two fault codes: P0204 (Injecto...
2003 Dodge Ram 2500 Cummins | P02041997 Dodge Stratus P0140 P0141 P0455 Codes - O2 Sensor and Post-Cat Issue at 110,000 Miles
A friend owns a 1997 Dodge Stratus with approximately 110,000 miles, equipped with a 2.4L 16-valve engine and automatic transmission. The check engine light comes on intermitten...
1997 dodge stratus | P0140P0172 Diagnostic Code on 2004 GMC Envoy: Causes and Fixes
Imagine the frustration you'd have avoided by purchasing the correct part from your dealer and installing it at your chosen repair shop. If you had mentioned that the replacemen...
Envoy | P01721996 Nissan Maxima - P0325
I've got a 1996 Nissan Maxima with 126K miles. It's been running fine all it's life. My sister has been driving it for the last 2K miles, and just reported the following to me...
1996 Nissan Maxima | P03252002 Ford F150 4.2L V6 with P0171 and P0174 Codes: Poor Performance Under Load and in Wet Conditions
I own a 2002 Ford F150 4.2L V6 with persistent P0171 and P0174 OBD2 diagnostic codes. These have been present for some time, and despite multiple attempts to resolve them, the i...
2002 F150 4.2 V6 | P0171P0300 Fault on 2001 Chevrolet Suburban 2500 6.0L - Check Engine Light Flashes Above 73 MPH
I am experiencing a persistent P0300 misfire code on my 2001 Chevrolet Suburban 2500 with a 6.0-liter engine. The truck runs smoothly under normal conditions until it reaches 73...
Chevy Suburban | P03001999 Mercury Villager P0325 and P0135 Fault: O2 Sensor Replacement and Knock Sensor Short Diagnosis
I recently encountered both P0325 (Knock Sensor Circuit Malfunction) and P0135 (Oxygen Sensor Heater Circuit Malfunction) on my 1999 Mercury Villager. After replacing the oxygen...
1999 Mercury Villager | P01351999 Toyota Camry 2.2L Engine Code P1133 - Front O2 Sensor Replacement Guide
My 1999 Toyota Camry 2.2L engine light came on at 108,000 miles. After connecting a code scanner, I found the fault code P1133, which indicates a problem with the front oxygen s...
Camry 1999 2.2 | P1133Honda Odyssey 2000 P0170/P0172/P1491 and P0300-P0305 Codes: EGR Valve Failure & Intake Carbon Blockage Diagnosis
My 2000 Honda Odyssey (107,000 miles) has been exhibiting persistent engine trouble with DTCs including P0170 (Fuel Trim Bank 1 - System Too Rich), P0172 (System Too Rich Bank 1...
honda 2000 odyssey | P01701998 GMC Sonoma SLS 4.3L Engine P0404 Code: Exhaust Gas Recirculation Issue Diagnosis and Repair Tips
Hello, I own a 1998 GMC Sonoma SLS with a 4.3L V6 engine, 4x4 automatic transmission, and over 150,000 kilometers on the odometer. Recently, I've noticed inconsistent engine be...
1998 Sonoma SLS | P04042001 Jetta P0100 and P0400 Diagnostic Trouble Codes: Causes and Fixes
We own a 2001 Volkswagen Jetta (4-cylinder, automatic transmission) that is displaying two stored diagnostic trouble codes during an OBD-II scan: - TC1: P0100 - Mass or Volume ...
2001 Jetta | P0100P0304 Fault on 1997 Toyota Camry 4-Cylinder: Injector No Voltage, PCM or Wiring Issue?
Hello! I'm experiencing a persistent P0304 diagnostic code on my 1997 Toyota Camry with a 4-cylinder engine. The code indicates a misfire in cylinder #4. I've already replaced t...
97 Camry 4 Cylinder | P03042000 Jeep Cherokee P0705: Trans Range Sensor Circuit PRDNL Input Fault - Diagnosis and Fixes
I'm experiencing a P0705 fault code on my 2000 Jeep Cherokee Sport. The diagnostic reads 'Trans Range Sensor Circuit PRDNL input'. I initially thought regular Jeep Cherokees do...
2000 Jeep Cherokee | P07052002 Chrysler Neon P1684 and P0303 Codes: Battery Disconnection & Cylinder Misfire Explained
I'm experiencing both P1684 and P0303 diagnostic codes on my 2002 Chrysler Neon. The P1684 code indicates that the battery was disconnected within the last 50 vehicle starts, wh...
2002 Chrysler Neon | P1684Practical 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.