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.
2000 Jeep Cherokee 4.0L Misfire with Flashing CEL: Diagnosis and Fix Guide
Hi everyone, this is my first post on the forum — I’ve been researching a persistent issue with my 2000 Jeep Cherokee Sport (4.0L 6-cylinder, 138,000 miles) and thought I’d shar...
2000 Cherokee | P00102001 Chevy 2500HD 8.1L Engine P0101 Fault: MAF Sensor Issue with Power Loss at Low Speeds
My 2001 Chevrolet 2500HD with an 8.1L engine has been showing only one diagnostic trouble code: P0101 (Mass Airflow or Volume Air Flow Sensor - Circuit Range/Performance). The c...
2001 Chevy 2500HD | P01011999 Honda Accord 3.0L V6 Check Engine Code P2145 - EGR Vent Circuit High Diagnosis
Hello everyone, I'm helping my son with his 1999 Honda Accord 3.0L V6 that recently developed a check engine light after an EGR valve replacement. The new fault code is P2145 — ...
1999 Accord 3.0 V6 | P21452002 Toyota Camry P0420 Code: How to Diagnose Catalyst Converter Failure Without Spending Hundreds?
My 2002 Toyota Camry (123,000 miles) has been running smoothly with only a slight drop in fuel efficiency. Recently, I've received a P0420 diagnostic trouble code indicating a c...
Camry | P04201996 GMC Suburban 5.7L P0300 Random Misfire: Diagnosis and Solutions with Crank Sensor & Valve Guide Issues
I own a 1996 GMC Suburban with a 5.7L V8 engine, and I'm currently experiencing persistent random misfires detected by the OBD-II code P0300. The check engine light flashes inte...
1996 GMC Suburban 1500 | P03001997 Dodge Dakota 3.9L V6 P0320 P1391 P1398 Fault Diagnosis: Cam or Crank Sensor?
I recently purchased a 1997 Dodge Dakota with a 3.9L V6 engine and 4WD. When I inspected the vehicle, the Check Engine Light (CEL) was already on. After using O'Reilly's code re...
1997 Dakota | P03202002 Dodge Neon OBDII P1281 Code: Engine Cold for Too Long - Diagnosis and Fixes
I recently scanned my daughter's 2002 Dodge Neon and found OBDII diagnostic code P1281. The manufacturer-specific description states 'engine is cold for too long.' Based on this...
Dodge Neon | P21771999 Ford Taurus P1507 and P1156: Idle Issues, Throttle Surge, and Solutions
Hello everyone, My mother's 1999 Ford Taurus is experiencing difficulty idling when cold-starting, and occasionally surges in throttle speed while driving or parked—especially ...
1999 Ford Taurus | P11512002 Toyota Camry P0420 Code: Diagnosis, Warranty & Repair Options
My 2002 Toyota Camry started showing the P0420 diagnostic code during a road trip. The check engine light activated right after refueling at a gas station. After connecting a OB...
2002 Camry | P04202004 Yukon Denali P0420 Code: Causes, Bank 1 Location, and Repair Steps
I recently encountered a P0420 code on my 2004 Yukon Denali, specifically for Bank 1. I initially thought that replacing factory spark plugs and wires at around the 100k-mile ma...
04 yukon denali | P04202000 Dodge Durango 5.2L Running Poorly with P0132, P0135, and P0138 OBD2 Codes After Sensor Replacement
I own a 2000 Dodge Durango with a 5.2L engine that has started running poorly after it warms up. The vehicle is now displaying OBD2 fault codes P0132, P0135, and P0138. I've alr...
2000 dodge durango | P01322001 Toyota Celica GT PO171 and PO1349 Oxygen Sensor Codes - Persistent Issues After Engine Rebuild
I own a 2001 Toyota Celica GT with less than 500 miles on a rebuilt long-block engine. The rest of the vehicle has approximately 45,000 original miles. The car was stored for se...
Toyota | P1349P0011 Camshaft Position Sensor Fault - Mazda CX-7 Head Gasket Diagnosis
Hi everyone, I'm experiencing a P0011 diagnostic trouble code on my Mazda CX-7. Recently, I also performed an oil check and noticed antifreeze in the engine oil. Could a blown h...
Mazda CX7 | P00112003 Ford Taurus SES P0171 and P0174 Fault: Leaking Intake Hose Fix & Ford Recall Concerns
This issue has been resolved, but the root cause was a significant leak in the intake manifold hose. The problem is widespread across many 2003 Ford Taurus SES models, with nume...
2003 Ford Taurus SES | P0171P0420, P0120, and P0300 on a 1997 Chevrolet Grand Prix 3.8L V6 - What Causes These Codes and How to Fix Them?
I recently purchased a 1997 Chevrolet Grand Prix with a 3.8L V6 engine. I've started noticing significant engine misfires and poor performance, which triggered the check engine ...
3.8L Grand Prix | P0120P0011 Fault After Serpentine Belt Replacement on 2007 Toyota Yaris - Solenoid Issue and Timing Adjustment?
I recently replaced the serpentine belt on my 2007 Toyota Yaris (1.5L, 5-speed manual) using a scan gauge. During the process, I accidentally disconnected the solenoid located n...
Toyota | P00112006 Fiesta ST P0172 Error After Fuel and Engine Modifications - Causes and Diagnostics
Hi everyone, I recently modified my 2006 Fiesta ST with de-catted intake, a new manifold and branch system, and upgraded to Cosworth-style 200BHP cams — slightly longer duratio...
2006 Fiesta ST | P01722003 Nissan Sentra 2.5L P0011 and P0300 Codes: Valve Over-tightening or Timing Issue? Warranty Engine Rebuild Concerns
I recently purchased a rebuilt 2.5L engine for my 2003 Nissan Sentra SE-R Spec V and had it installed by a local mechanic. Since installation, the vehicle has exhibited rough id...
2003 nissan sentra 2.5 | P0011Practical 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.