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.
1994 Astro Base Model with No A/C Shows Diagnostic Code P66 - Hard Start and Hesitation at Acceleration
Hello, I own a 1994 Chevrolet Astro base model without air conditioning. After replacing the Engine Control Module (ECM), I've noticed that the vehicle starts difficult in the m...
94 Astro | P06661997 Mercedes-Benz E300 Fault Codes P1615, P1630, P1520, B1755 - Diagnosis & Solutions
I recently purchased a 1997 Mercedes-Benz E300 and have been encountering several diagnostic trouble codes: P1615, P1630, P1520, B1755, as well as additional codes including 140...
1997 Mercedes-Benz E300 | B17552002 Chevrolet Envoy P0740 P0785 P1860 - Torque Converter Related Fault Codes Diagnosis
I own a 2002 Chevrolet Envoy 4x4 and am currently encountering diagnostic trouble codes P0740, P0785, and P1860. These codes are associated with the torque converter and transmi...
2002 Envoy | P07402004 Nissan Sentra P0128 Error Code: Thermostat or ECT Sensor Replacement?
What is the most likely solution for resolving the P0128 error code in a 2004 Nissan Sentra 1.8L GXE? Should I replace the thermostat or the Engine Coolant Temperature (ECT) sen...
2004 Nissan Sentra | P01282001 Hyundai Accent P1402 Code: Causes and Solutions - Is Fuel Tank Diagnostic Module Replacement Necessary?
Does a P1402 diagnostic code on a 2001 Hyundai Accent indicate that the fuel tank diagnostic module needs to be replaced? This code is known to trigger in North American models,...
2001 Hyundai Accent | P14022006 Dodge Ram 2500 5.7 Hemi - C2206 Fault Code: No Start, Communication Error Between Modules
My 2006 Dodge Ram 2500 with a 5.7L Hemi engine cranks over but will not start. The code scanner only displays a transmission-related fault code (C2206). I suspect this isn't the...
2006 dodge ram 2500 | P2177P1151 Fault with 1997 Ford Ranger V6 4.0L: Causes, Misfire Codes & Diagnosis Tips
Hi everyone, My 1997 Ford Ranger V6 4.0L has recently triggered a P1151 fault code along with two cylinder misfire codes (P0302 and P0306). I replaced the spark plugs and ignit...
1997 Ford Ranger | P11512006 Ford Expedition P0345 and P0349 Codes: Diagnosis and Fix for 5.4L V8 Engine
Hi everyone, I'm new to the forum but have been working on cars for years — this issue is driving me crazy. I own a 2006 Ford Expedition Limited with a 5.4L V8 engine and am cu...
2006 Ford Expedition | P03452003 Pontiac Bonneville Engine Stalls with P0204 OBD2 Code - Diagnosis and Fixes
I own a 2003 Pontiac Bonneville that suddenly begins stalling without any warning. The vehicle restarts after shutdown, but the check engine light is on with code P0204. I've al...
2003 Pontiac Bonneville | P02042003 Volkswagen Jetta P1635 P0733 P0734 Transmission Issues - Diagnosis and Solutions
I own a 2003 Volkswagen Jetta V6 2.8L with persistent transmission error codes P1635, P0733, and P0734. The car has a Tiptronic transmission, and I'm only concerned about first ...
2003 Volkswagen Jetta | P07332004 Ford Ranger 3.0L Engine O2 Sensors Stuck in Rich Mode Diagnosis and Fixes
I'm experiencing an issue with my 2004 Ford Ranger 3.0L engine where the oxygen (O2) sensors are consistently showing a 'stuck rich' condition, resulting in poor fuel efficiency...
2004 ranger3.0 | P0171Dodge Ram 3500 P2609 Trouble Code: Causes and Fixes for Engine Intake Air Heater Fault
I own a Dodge Ram 3500 and recently received trouble code P2609. What steps should I take to diagnose and fix this issue? The code indicates a problem with the engine intake air...
dodge ram 3500 | P26091999 Dodge 3500 Ram Van P0305 Recurring Cylinder 5 Misfire - Diagnosis & Solutions
I own a 1999 Dodge 3500 Ram Van with motorhome conversion. Over the past four months, I've been experiencing a recurring P0305 engine misfire code, accompanied by rough idle and...
1999 Dodge | P0305How to Fix P0411 Emission Code on 2007 Chevrolet Cobalt - DIY Guide
My 2007 Chevrolet Cobalt has been showing a check engine light for about a month, with the diagnostic code P0411. I reset the system, but it returned the next day specifically d...
2007 Chevy Cobalt | P04112003 Chevy Tracker 2.5L O2 Sensor Replacement: How to Identify and Fix Without Professional Help
Hi everyone, I recently received a recommendation that my 2003 Chevy Tracker's oxygen (O2) sensor may need replacement, but the quoted price is quite high. After some research,...
2003 Chevy Tracker | P21772003 Chevy Tracker 2.5L - Fixing P0128, P0340, P0420, and P0430 Without Replacing the Catalytic Converter
I've been getting three OBD-II fault codes on my 2003 Chevy Tracker 2.5L: P0128, P0340, P0420, and P0430. After visiting multiple repair shops, I'm being quoted over $1,800 — fa...
2003 Chevy Tracker | P01281998 Chevrolet Pickup 4.3L Engine P0302 and P0420 Codes: Causes and Fixes
I own a 1998 Chevrolet Pickup with a 6-cylinder 4.3L engine. My vehicle failed an emissions inspection because the battery had been dead for some time, resulting in loss of stor...
1998 chevrolet pickup | P03021995 Mercedes C220 P0170 Code: Fixed Crimped Fuel Injector Wire, Now Experiencing Erratic RPMs - How to Fix?
I own a 1995 Mercedes-Benz C220 with a persistent P0170 fault code. After diagnosing and repairing a crimped fuel injector wire, I'm now experiencing erratic engine RPMs—especia...
1995 C220 Mercedes | P0170P0783 OBD2 Code: 3-4 Gear Transmission Malfunction in 2007 Chevrolet Optra LT
Posted on Sun Dec 13, 2015 at 11:29 AM I own a 2007 Chevrolet Optra LT and am experiencing a serious issue with my automatic transmission. The vehicle struggles to shift from 3r...
3-4 | P0783Practical 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.