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.
P0742 OBD2 Code in 2001 Pontiac Grand Prix GT (3.8L V6) - Transmission Shift Issues & Repair Guidance
I recently purchased a 2001 Pontiac Grand Prix GT with a 3.8L V6 (3800 Series II engine). Everything was running fine until today, when I noticed unusual transmission behavior. ...
Pontiac Grand Prix GT | P0742P0305 OBD2 Code on 2012 Chevrolet Express Van 2500 6.0L Diesel - Diagnosis and Troubleshooting
I recently replaced the coil pack, spark plugs, and ignition wires on my 2012 Chevrolet Express Van 2500 with a 6.0L diesel engine. I also performed a stabiltrac service and fil...
2012 Chev Express Van 2500 | P03052005 Chevrolet Tahoe 5.3L: P0107, P0171, and P0332 Fault Codes - Common Cause & Repair Priority
Hello everyone, I recently diagnosed a 2005 Chevrolet Tahoe with a 5.3L V8 engine and found three diagnostic trouble codes: P0107, P0171, and P0332. The P0332 code initially c...
2005 tahoe 5.3 | P01072009 Chevrolet Silverado P0641, P06A6, and P069E Codes: Fuel System & Starting Issues Explained
I own a 2009 Chevrolet Silverado with the check engine light illuminated. My OBD2 scan tool shows three diagnostic trouble codes: P0641 (5-volt reference voltage incorrect), P06...
2009 Chevrolet Silverado | P06412004 CHEVY PICKUP P0135 and P0155 O2 Sensor Fault - After Replacing Sensors Still Not Fixed
I own a 2004 Chevrolet Pickup, and my truck is consistently throwing diagnostic trouble codes P0135 and P0155. I have already replaced both oxygen (O2) sensors, but the codes pe...
CHEVY PICKUP | P01352005 Hyundai Accent P0442 Code: How to Diagnose and Fix Evap System Leak
Hi everyone, I recently encountered a Check Engine Light (CEL) while driving home from work. Upon scanning my 2005 Hyundai Accent, I found a P0442 code indicating an evaporativ...
2005 Hyundai Accent | P0442Honda Odyssey 2002 P0131 Code Meaning and Explanation
I'm looking for information about the P0131 diagnostic trouble code in my 2002 Honda Odyssey. What does this code mean, and what should I do to address it? Any technical details...
Honda Odyssey | P01312007 Pontiac Grand Prix P2138 Code: Wet Weather Only Reduced Engine Power & Cruise Control Failure
Hi everyone, I own a 2007 Pontiac Grand Prix with a sunroof that has been throwing DTC P2138 for nearly a year. The issue only occurs during rainy or wet road conditions, when ...
Grand Prix | P21382000 Dodge Caravan P0743 Code: Torque Converter Clutch Solenoid Issue and Gear Indicator Problems
Hi everyone, I'm looking for help with a recurring issue on my 2000 Dodge Caravan. My van was running perfectly until suddenly it started revving uncontrollably, followed by all...
2000 dodge caravan | P07432007 Silverado 5.3. Fuel Intake and Evap Issue
I know that there posts on this issue but mine is a tab different. My 07 Classic has NEVER taken fuel from a high pressure gas pump. Sometimes it takes 10 minutes to fill up. I ...
2007 Silverado 5.3 | P21772006 Hummer H3 Fault Codes P0128 and P0017: Causes and Solutions for 3.5L V5 Engine with 118,000 Miles
I own a 2006 Hummer H3 with the Off-Road Package and a 3.5-liter straight-5 engine, currently at 118,000 miles. Recently, I replaced the radiator due to a crack. Since then, my ...
2006 Hummer H3 | P0017Ecotec 2.2 Engine Stalls on Acceleration with Codes P0122, P0223, P2135, and P0220
My Ecotec 2.2 engine light comes on and the car almost stalls when I accelerate hard or medium—only allowing a very slight gas pressure to move forward. This issue occurs specif...
Ecotec 2.2 | P0122Kia Sorento 2005 OBD2 Code P0058 and P0156 - Location of O2 Sensor Bank 2, Sensor 2
I own a 2005 Kia Sorento and am currently experiencing OBDII diagnostic codes P0058 and P0156. I would like to know the exact location of the O2 sensor for Bank 2, Sensor 2. Can...
kia | P0058Mercedes Vito 115CDI Fault Codes P2014 and P2062 - Loss of Pulling Power
My Mercedes Vito 115CDI is showing fault codes P2014 and P2062, which are associated with a loss of pulling power. The vehicle experiences reduced engine performance during oper...
Mercedes Vito 115cdi | P20142007 Pontiac G5 Multiple OBD2 Codes (P0030, P0036, P0053, P0054, P0102, P0443) - How to Diagnose and Fix?
I'm experiencing multiple OBD2 diagnostic trouble codes on my 2007 Pontiac G5: - P0030: HO2S Heater Control Circuit (Bank 1 Sensor 1) - P0036: HO2S Heater Control Circuit (Bank...
2007 Pontiac G5 | P21772001 Pontiac Grand Prix GT P0420 Code: How to Fix Catalyst System Low Efficiency
Hi everyone, I own a 2001 Pontiac Grand Prix GT and am currently struggling with a persistent DTC P0420 code — 'Catalyst System Low Efficiency Bank 1'. I've already replaced t...
2001 Pontiac Grand Prix GT | P04201998 Dodge Ram OBD-II Fault Codes P1688 and P1693: Fuel Pump Control Module & Companion Module Issues
The 1998 Dodge Ram is displaying OBD-II diagnostic trouble codes P1688 and P1693. These codes indicate potential issues with the Fuel Pump Control Module (FPCM) and a companion ...
Ram | P1688Practical 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.