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 Honda Accord P0780 Code: What Does It Mean and How Much Will Repair Cost?
Hi everyone, I'm looking for information about the P0780 diagnostic code on my 2002 Honda Accord. This is a transmission malfunction code that has been triggered by my mechanic....
2002 Honda Accord | P0780P0102 OBD2 Code on 2002 Chevrolet Bonneville SSEi: Diagnosis and Solutions
I recently received a P0102 diagnostic trouble code on my 2002 Chevrolet Bonneville SSEi. After resetting the system, the code persisted and was replaced by a P0100 (Mass Airflo...
2002 Bonneville SSEi | P01022005 Hyundai Tucson V6 Transmission Fault Codes P0700 and P0734 - What Does This Mean?
I recently received diagnostic trouble codes P0700 and P0734 on my 2005 Hyundai Tucson with a V6 engine. What kind of transmission damage or issues might these codes indicate? I...
2005 Hyundai | P0700PO171 Fault on Hyundai Santa Fe 2.4L - OBD-II Code Diagnosis and Repair
Hi everyone, I'm experiencing OBD-II fault code PO171 on my Hyundai Santa Fe 2.4L engine. After replacing the cracked exhaust manifold and resetting the system, the MFL (Malfunc...
HYUNDAI Santa FE | P0171PO136 and PO141 Codes on 1999 Subaru Forester: O2 Sensor or Wiring Issue?
I own a 1999 Subaru Forester with a 2.5L engine. About a year ago, before my vehicle inspection, I received a check engine light triggered by code PO136. I replaced the oxygen (...
1999 Subaru Forester | P0136P0171 Diagnostic: System Too Lean Bank 1 on 2001 Pontiac Montana
The vehicle is displaying fault code P0171, indicating a 'System Too Lean Bank 1' condition. This typically points to an air-fuel mixture that is too lean in the first engine ba...
2001 Pontiac Montana | P01712001 Pontiac Montana P0300 - Cylinder Misfire Detected: Causes and Fixes
I'm experiencing a P0300 diagnostic trouble code on my 2001 Pontiac Montana, which indicates a cylinder misfire. I'm not sure what could be causing this issue. The engine runs r...
2001 Pontiac Montana | P0300P0300 Random Cylinder Misfire and Trac Loc/ABS Service Light on 2001 Chevrolet Cavalier
I've been experiencing a persistent P0300 code indicating multiple random cylinder misfires on my 2001 Chevrolet Cavalier 2.4L engine. I recently replaced the spark plugs, but t...
2001 Cavalier | P03001998 Mustang GT OBD2 Fault Codes P0430 and P1151 - Help Needed with Rich Running and Oil Burn
I own a 1998 Mustang GT with 150,000 miles on the odometer. Recently, my check engine light activated, and the OBD2 diagnostic system returned codes P0430 and P1150. Previously,...
98 mustang gt | P04302003 Volkswagen New Beetle Diesel: Fixing P0671 Glow Plug Heater Fault - OBD2 Code Guide
I own a 2003 Volkswagen New Beetle diesel with a 5-speed manual transmission. The check engine light is on, and my OBD2 scan tool has detected code P0671: MOD$0A GLOW PLUG/HEATE...
2003 VOLKSWAGEN NEW BEETLE | P06711990s Chevrolet Trans Am P0171 and P0174 OBD2 Codes: Causes and Fixes After Fuel Fill-Up
My check engine light came on with OBD2 diagnostic codes P0171 and P0174. This occurred immediately after I refilled the fuel tank. I cleared the codes, and they remained off fo...
01 Trans Am | P01711998 Nissan Frontier P0446 & P0440 Code Troubleshooting: Alternator, Dashboard Lights, and Throttle Position Sensor Issues
Hello from Alabama! I recently purchased a 1998 Nissan Frontier Extended Cab and am experiencing several electrical and engine-related issues. After the speedometer stopped work...
98 Nissan Frontier | P044096 Dodge Neon P0401 Code Recurring: EGR Valve, Exhaust Flow, and Catalytic Converter Diagnosis
I own a 1996 Dodge Neon SOHC with approximately 200,000 miles on it and a manual transmission. Recently, I've noticed a slight drop in fuel efficiency compared to my usual excel...
96 dodge neon | P0401P0171 and P0174 Codes on 1999 Ford F150: Causes, Fixes, and Diagnostics for Lean Fuel Conditions
I'm a DIY enthusiast with solid experience working on vehicles from 1985 to the present. I'm currently troubleshooting a 1999 Ford F150 (2WD, 5.4L V8) that has triggered OBD II ...
1999 Ford F150 | P01711997 Nissan Altima P0400 Code: EGR Flow Malfunction Fix and Safe Driving Advice
Hello everyone, I'm looking for some advice regarding a persistent P0400 code on my 1997 Nissan Altima. After completing basic diagnostics, I found that the exhaust gas recircul...
Nissan Altima | P04002000 Dodge Stratus P0172 Code: Causes, Fixes, and What to Avoid
I own a 2000 Dodge Stratus with a 2.4L Dual Overhead Cam engine. The vehicle is currently throwing a P0172 diagnostic trouble code (DTC), indicating an oxygen sensor circuit mal...
2000 Dodge Stratus | P0172Practical 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.