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.
P0717 Fault Code on GM Vehicle: What Does It Mean?
I'm experiencing the P0717 fault code on my GM vehicle, which appears and then disappears every few days. I'm not sure what this code indicates or how to diagnose it. Can anyone...
GM Car | P0717P0440 Code on 2000 Toyota Corolla: Is the Garage's $1,093 Repair Estimate Legitimate?
I recently received a P0440 diagnostic code during my 2000 Toyota Corolla's emission test. I took the car to a franchise garage for evaluation, where they estimated four repairs...
2000 Corolla | P04401996 Ford Ranger P0153, P0401, P1151 Codes: Causes, Fixes & Most Inexpensive Solutions
Vehicle: 1996 Ford Ranger - 4.0L V6, 4x4, Automatic Transmission, 126,000 miles Issue Description: The vehicle exhibits poor idle performance and noticeable engine miss at idle...
1996 Ford Ranger | P0153P0507 Diagnostic and High Idle Issue in 2003 Nissan Altima (77K Miles)
I recently purchased a used 2003 Nissan Altima with 77,000 miles. The vehicle exhibits high idle RPMs and has triggered the P0507 diagnostic error code. I've ruled out vacuum le...
Nissan Altima | P05072001 Buick Regal P0128 Code: What Does It Mean and Should I Replace the Thermostat?
My 2001 Buick Regal recently triggered the Service Engine light, which came on after short daily drives to and from work. The warning light turned off a few days ago, but today ...
2001 Buick Regal | P0128P0122 and P0108 Fault Codes on 1998 Buick Century 3.1L Engine - Diagnosis and Repair
My 1998 Buick Century with a 3.1L engine recently developed fault codes P0122 (Manifold Absolute Pressure Sensor Range/Performance Problem) and P0108 (Manifold Absolute Pressure...
98 Buick Century | P01081998 Chevrolet Silverado 5.7L - P0300 Multiple Cylinder Misfire at High Speeds
Hi everyone, I'm having an issue with my 1998 Chevrolet Silverado equipped with the 5.7L V8 engine, which has accumulated 122,000 miles. The vehicle is throwing a P0300 code ind...
1998 Silverado 5.7 | P03002000 Neon P0134 Code: How to Fix Upstream O2 Sensor Issue and Resolve P0171 Lean Condition
I'm currently troubleshooting a neighbor's 2000 Neon that is displaying a P0134 diagnostic trouble code. I've already tried common fixes, including replacing the upstream oxygen...
2000 neon | P01342001 Chrysler 300M P0140 and P0161 O2 Sensor Codes: Wiring Issue Diagnosis and Smog Readiness Fix
Hi there, I recently noticed my check engine light is on in my 2001 Chrysler 300M with a 3.5L V6 engine (approximately 82,500 miles). A diagnostic scan revealed two trouble cod...
2001 Chrysler 300M | P014096 Pontiac 3.1L Engine P0401 Code: EGR System Failure After Multiple Decarbonizations and Repairs
I own a 1996 Pontiac 3.1L V6 engine vehicle that consistently triggers the P0401 diagnostic trouble code (DTC). The dealership has performed three decarbonization treatments and...
96 pontiac 3.1 | P04011996 Saturn S-Series P0401 DTC: Incorrect EGR Valve Flow Rating Causes Insufficient EGR Flow
I'm experiencing a persistent P0401 (EGR Insufficient Flow) code on my 1996 Saturn S-Series. I've replaced the EGR valve twice—using two different brands—and the issue persists....
96 Saturn | P04012004 Chevy 6.0L 2500HD P0300 Code: Causes, Diagnosis & Fuel Pump Replacement Guide
Hello, My 2004 Chevrolet 6.0L 2500HD pickup is currently throwing the P0300 misfire code. The truck has 92,000 miles on it and is equipped with a 5-speed manual transmission. I...
2004 Chevy 6.0L 2500HD | P03001998 Dodge Neon RT 2.0L - OBD2 Codes P0172 and P0340: Idle Dies, Requires Gas Hold to Start
My 1998 Dodge Neon RT 2.0L engine runs fine at high RPMs but occasionally dies when idling after stopping. To keep it running, I must hold the gas pedal down—this is especially ...
1998 neon rt 2.0 | P01721997 Dodge Avenger 2.5L V6 P0171 and P0174 OBD2 Codes: Diagnosis & Solutions for Lean Mixtures
I own a 1997 Dodge Avenger with a 2.5L V6 engine, and I'm currently experiencing persistent OBD2 diagnostic codes P0171 and P0174 — two sets of each. After replacing all four ox...
1997 Dodge Avenger | P017199 Dodge Durango PO206 and PO306: White Smoke, Gasoline Odor, Injector Circuit Issue
My 1999 Dodge Durango is blowing out white smoke from the exhaust with a strong gasoline smell. I've already replaced all spark plugs and two fuel injectors, but the issue persi...
99 Dodge Durango | P02062004 Chevy Silverado 5.3L Engine P0101 Code: Causes and Fixes for MAF Sensor Issues
I'm experiencing intermittent P0101 fault codes in my 2004 Chevrolet Silverado with a 5.3L V8 engine. The check engine light only activates during aggressive driving—such as sud...
2004 Chevy Silverado | P0101P0455 OBD2 Fault Code in 2006 Ford Taurus: Diagnosis and Next Steps
I've successfully cleared the P0455 diagnostic trouble code on my 2006 Ford Taurus, and the check engine light has turned off. However, I'm unsure what to do if the light reappe...
2006 Taurus | 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.