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.
2003 Mercury Mountaineer PCM Failure: P0351-P0358 and P0511, P0128 - All 8 Coil Packs Failed? Diagnosing Spark and Engine Start Issues
I'm experiencing multiple diagnostic trouble codes on my 2003 Mercury Mountaineer: P0351-P0358, P0511, and P0129. The presence of all eight coil pack fault codes (P0351–P0358) s...
2003 Mercury Mountaineer | P0128Mazda3 2010 DTC P0172: Long Term Fuel Trim Issue After MAF Sensor Replacement
Hello, I'm from China and my English is not perfect, so sorry for any mistakes. I own a 2010 Mazda3 with a 2.0L engine and automatic transmission. Recently, I've been experienci...
MAZDA3 | P017299 VW Beetle 2.0L Manual Transmission with Codes P0300, P0302, P0303 and P0303PD - Engine Misfire Diagnosis
Hello everyone, I'm new to this forum. My wife has a 1999 VW Beetle 2.0L with manual transmission, air conditioning, and over 158,000 miles. The engine was rebuilt at approximat...
99 vw beetle | P03002004 Mazda 6 P2187 Code: Fuel System Too Lean at Idle - Diagnosis & Fixes
I own a 2004 Mazda 6 with a 2.3L 4-cylinder engine and 5-speed manual transmission, currently at 108,000 miles. The check engine light is on, and the fault code retrieved is P21...
2004 Mazda 6 | P2187P0430 OBD2 Fault Code in 2002 Ford Crown Victoria LX - Need Advice on PCM Reprogramming or Catalytic Converter Replacement
I own a 2002 Ford Crown Victoria LX. Last year, I replaced the Powertrain Control Module (PCM) after the vehicle began running roughly and exhibiting erratic engine behavior. Af...
Ford Crown Victoria | P0340BMW 540i P0440 Code: Evaporative Emissions Issue - DIY Fix or Professional Help?
Hello everyone, I recently purchased a 2000 BMW 54-0i with 173,640 miles. The vehicle is equipped with a 4.4L V8 engine and an automatic transmission (MPack system installed). ...
BMW 540i | P0440Mazda 3 2006 2.0L Rough Idle and Stalling with OBD-II Code EVAP Monitor (Cap Off)
I'm new to this forum and am seeking help diagnosing a recent issue on my 2006 Mazda 3 2.0L. I've noticed the vehicle has been experiencing a rough idle, especially at certain e...
Mazda 3 | P2177P0720 Diagnostic Code in 2002 Honda Civic: Auto Transmission Failure
The automatic transmission in my 2002 Honda Civic suddenly stopped functioning, and a P0720 diagnostic code was detected using an OBD2 scanner. The vehicle is now experiencing t...
2002 Honda Civic | P07202008 Ford Fusion P0016 Fault Code: Diagnosis and Repair Guide
I'm currently working on a 2008 Ford Fusion that has been fitted with a used engine. The vehicle runs reasonably well, but the check engine light remains on due to the persisten...
2008 Ford Fusion | P00162002 Jeep Liberty 3.7L V6 - P0031, P0132, P0352-P0356 Fault Codes: Idle Issues & Ignition Coil Problems
2002 Jeep Liberty 3.7L V6 engine, 155,248 miles. I recently purchased this vehicle for $1,000 and have encountered multiple issues. Initially, the car started and ran fine when ...
2002 Liberty | P00311997 Chevrolet Astro Van P0123 and P0118 Fault: Coolant & Throttle Sensor Issues, Fuel Pressure Diagnosis
This is my first post on the forum. I'm currently working on a friend's 1997 Chevrolet Astro Van with a 4.3L Vortec V6 engine, automatic transmission, air conditioning, and 2-wh...
97 Astro Van | P01182001 Hyundai Tiburon P0116 Code: Causes and Solutions After Replacing ECT Sensor and Wiring
I own a 2001 Hyundai Tiburon that consistently displays the P0116 diagnostic trouble code. I've already replaced the engine coolant temperature (ECT) sensor, sending unit, and a...
2001 Hyundai Tiburon | P01161998 Chevy Cavalier Z24 P0172: Bank 1 System Too Rich - Diagnosis & Fixes
Hi everyone, I recently had my 1998 Chevy Cavalier Z24 tuned up about a month ago. Since then, the check engine light came on while driving yesterday, and the diagnostic scan sh...
98 Chevy Cavalier Z24 | P0172P0128 Fault and Temperature Gauge Failure in 2001 Oldsmobile Alero
I own a 2001 Oldsmobile Alero equipped with a 3400 engine. Recently, the vehicle triggered a P0128 diagnostic trouble code, and the temperature gauge has stopped functioning ent...
2001 Olds Alero | P0128P0700 Diagnostic Code on a 1996 Chevrolet T10 4x4 Stick Shift Truck
I own a 1996 Chevrolet T10 4x4 pickup with a 4.3L engine and am currently seeing a P0700 diagnostic code, but no other related codes. This vehicle is equipped with a manual tran...
stick shift | P0700Practical 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.