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 VW Passat 1.8T Persistent P0171 Code - Solutions and Fixes
I own a 2002 Volkswagen Passat with the 1.8L T engine and have been experiencing a recurring P0171 fault code. Despite addressing two key issues, the code continues to appear af...
2002 VW Passat 1.8T | P01712003 Ford Taurus 3.0L DOHC Engine Codes P1132, P1152, P0171, P0174 - Diagnosis and Fix
The check engine light has activated on my 2003 Ford Taurus 3.0L DOHC engine, and the OBD-II scanner reveals four diagnostic trouble codes: P1132, P1152, P0171, and P0174. These...
2003 Ford Taurus 3.0 DOHC | P01712001 Dodge Grand Caravan P0601 Code: After PCM Replacement, Poor Engine Performance - What's Next?
I own a 2001 Dodge Grand Caravan and recently encountered a persistent P0601 diagnostic trouble code. The vehicle was running roughly before I replaced the Powertrain Control Mo...
dodge grand caravan | P0601P0135 O2 Sensor Heater Circuit Fault - 2001 Mitsubishi Eclipse GS 4-Cylinder Diagnosis and DIY Repair Guide
Hello, I'm experiencing a P0135 diagnostic trouble code on my 2001 Mitsubishi Eclipse GS (4-cylinder). I've heard this relates to the oxygen sensor heater circuit, specifically...
Mitsu Eclipse GS | P013598 Blazer 4x4 4.3L Engine Fault: Code P0404 & P0420 Diagnosis and Solutions
I've completed extensive maintenance on my 1998 Blazer 4x4 with a 4.3L engine, including vacuum checks, new tune-up, air filters, intake manifold gaskets, and today replaced the...
Blazer 4x4 | P0404P0441 OBD2 Code on 1996 Toyota Camry: Causes and Fixes
I own a 1996 Toyota Camry, and the check engine light frequently comes on with fault code P044-1. I've already replaced the evaporative emission control system modulator valve a...
1996 Toyota Camry | P04412007 Dodge Caravan 3.8L P0420 Code: Aftermarket Converter Causes Repeated DTC - Diagnosis & Fix
I'm a fleet mechanic in Houston, TX, and I've been working on a 2007 Dodge Caravan 3.8L that's consistently throwing a P0420 diagnostic trouble code (DTC). The vehicle is used p...
2007 Dodge Carvan | P0420Honda Accord 2005 OBD Code P0108: Symptoms and MAP Sensor Diagnosis
I accidentally drove my Honda Accord 2005 through a puddle of water, which I believe caused a hydro-lock. The engine eventually started but with unusual noises. After replacing ...
Honda Accord | P0108P0404 Code in 1999 Chevrolet Silverado 5.3L: Diagnosis and Fixes After EGR Valve Replacement
New to the forum — hoping this is the right place to post. I own a 1999 Chevrolet Silverado with a 5.3L V8 engine, which continues to show the P0404 diagnostic trouble code alon...
Silverado | P04041996 Lumina 3.1 Code P0300, 98,000 miles
Heater hose ruptured near firewall and car was driven after overheating. Now Check Engine light is steadily blinking. Car runs but is erratic. Codes are as follows: 2 Codes P030...
1996 Lumina 3.1 | P03002002 Toyota 4Runner P0440, P0441, P0446 Diagnostic and Repair Guide
The check engine light (CEL) is on, and I've retrieved fault codes P0440, P0441, and P0446. I'm currently inspecting the evaporative emission system lines. Are there any additio...
02 4Runner | P04401997 Mercury Villager 3.0L V6 - P0325 and P0135 Codes: Chugging, O2 Sensor Failure & Coolant Reservoir Leak
Hello, I just returned from Advance Auto with check engine light diagnostics. The codes detected are P0325 (Cylinder 1 Knock Sensor Circuit Malfunction) and P0135 (Oxygen Senso...
1997 Mercury Villager | P01352008 Ford Ranger 3.0L V6 P0304 Cylinder 4 Misfire: Causes, Fixes & Solutions
I've been experiencing a persistent cylinder 4 misfire on my 2008 Ford Ranger with the P0304 diagnostic code for several months. I've already replaced all spark plugs and addres...
2008 ford ranger 3.0L V6 | P03041999 Ford Contour P0190 P0300 P0113 - Car Dies on Acceleration After Fuel Pump Replacement
Hello, I'm working on a 1999 Ford Contour that has been throwing trouble codes P0190, P0300, and P0113. The owner previously had a fuel filter replaced, and based on advice from...
1999 Ford Contour | P01132004 Dodge Status R/T Coupe 3.0L A/T - P0455 Code: How to Diagnose and Fix Without Gas Leak Signs
Hello everyone, I'm looking for help with a persistent P0455 diagnostic code on my wife's 2004 Dodge Status R/T Coupe (3.0L, automatic transmission, 172k miles). The car has no ...
2004 Dodge Status R/T Coupe | P0455Practical 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.