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.
1997 Ford Probe GT OBD2 Codes P0300, P0304, P0420, P1170, P1173 - Misfire, Catalyst Efficiency, O2 Sensor Issues
I own a 1997 Ford Probe GT with a 2.5L V6 engine and 5-speed manual transmission. The 'Check Engine' light turned on yesterday and began flashing, indicating a serious issue. Af...
97 Ford Probe GT | P03042003 Dodge Durango P0440 and P0456 Fault: How to Fix Without a Mechanic
My 2003 Dodge Durango has the check engine light on, and since it's due for a smog check to renew my tags, I went to AutoZone to get a code reader. The device cost $129.99 and r...
2003 Dodge Durango | P04402001 Dodge Grand Caravan 3.3L Flex Fuel - Troubleshooting Codes P0455, P0442, and P1684
David M I recently discovered two diagnostic trouble codes on my 2001 Dodge Grand Caravan Sport with a 3.3L flex fuel engine: P0455, P0442, and P1689. These codes are related t...
2001 Dodge Grand Caravan | P04422005 Chevrolet Express 3500 Van: Fuel Efficiency Issues with DTC Codes P0741 and P0894
Hello, I'm new to this forum. I've recently discovered two diagnostic trouble codes—P0741 and P089-than on my 2005 Chevrolet Express 3500 van. The vehicle is consuming significa...
05 Chevy Express 3500 van | P0741P1404 Diagnostic Code for 2003 Kia Spectra 1.8L - Differential Pressure Issue and Fix
My 2003 Kia Spectra 1.8L has recently triggered a P1404 diagnostic code, which reads 'Differential pressure not plausible (hose line defective) - Diesel'. This issue has been pr...
2003 Kia Spectra 1.8L | P1404P0456, P0440, and P0004 OBD2 Codes on 2006 Dodge Ram 2500: EVAP System & Fuel Control Issues
Hi everyone, I recently purchased a used 2006 Dodge Ram 2500 with a 5.7L Hemi V8 gasoline engine from a dealership about a month ago. During the test drive, the check engine lig...
2006 Dodge Ram 2500 | P0004PO113 Fault Code on 2004 Ford Escape: MAF Sensor Replacement Not Resolving Idle Issues
I recently replaced the Mass Air Flow (MAF) sensor on my 2004 Ford Escape, but the engine idle remains unstable and I'm still receiving a PO113 diagnostic trouble code. After ch...
Ford Escape | P01132001 Infinity QX4 P1131 Fault: Swirl Control Solenoid Explanation and Repair Guidance
Mileage exceeds 100,000 miles with no recent maintenance performed. The only recent issue was a newly programmed ignition key that wasn't properly coded, which caused starting p...
2001 Infinity QX4 | P11311998 Grand Am 2.4L DOHC Stalls at Idle with P0113 Code - Intake Air Temp Sensor Circuit High Input
Hi everyone, I'm new to car diagnostics and I have a 1998 Grand Am 2.4L DOHC engine. When I start the car, it may run smoothly at idle for about 30 seconds before stalling compl...
98 Grand Am | P01131999 Chevrolet K1500 O2 Sensor Codes P0134, P0154, P0155: Causes and Fixes
My 1999 Chevrolet K1500 is consistently throwing three oxygen sensor-related diagnostic codes: P0134 (Bank 1 Sensor 1), P0154 (Bank 2 Sensor 1), and P0155 (Bank 2 Sensor 1). The...
99 Chevy K1500 | P0134P0118 and P0181 Fault Codes - 2002 Kia Sedona Starting Issues and Low Idle
I own a 2002 Kia Sedona, which has been reliable up until now. Recently, the vehicle has started throwing diagnostic trouble codes P0118 and P0181. These are both circuit-relate...
Sedona | P01182001 Dodge Grand Caravan PCM Failure Cause: P0601 Code and Dealer Programming Concern?
I brought my 2001 Dodge Grand Caravan to the dealer last Saturday for a new key fob installation. Four days later, the vehicle would not start. The dealer has diagnosed an inter...
2001 Dodge Grand Caravan | P0601PO135 Fault Reappears After O2 Sensor Replacement on Astra 55 Reg
I recently replaced both oxygen sensors on my Astra 55 reg and reset the engine control unit. The check engine light initially turns off, but after driving for some time, it com...
Astra | P0135P0402 Fault on 2001 Ford Expedition 4.6L: Causes, Fixes & Diagnostics
I'm experiencing a persistent P0402 diagnostic trouble code (DTC) on my 2001 Ford Expedition with the 4.6L V8 engine. After replacing the EGR valve, throttle position sensor, DP...
2001 Ford Expedition 4.6L | P0402P0420 Fault Code on 2000 Camry V6 LXE - Possible Bad Converter or Rear O2 Sensor?
About three weeks ago, I had the exhaust pipe with catalytic converter replaced on my 2000 Toyota Camry V6 LXE. The original pipe was severely rusted at one of the mesh elbows. ...
2000 Camry | P0420PO300 OBD2 Code in 1997 Chevrolet Silverado 4x2 with 5.7L Engine - Diagnosis and Fixes
I own a 1997 Chevrolet Silverado 4x2 with a 5.7L V8 engine and automatic transmission. Over the past 12 months, I've completed several repairs including a full tune-up using Adv...
1997 Chevy Pickup | P0300P0158 and P0137 OBD2 Fault Codes in 2007 FJ Cruiser: Causes and Fixes
Hi everyone, I've been experiencing recurring OBD2 fault codes P0158 and P0137 on my 2007 FJ Cruiser. These codes usually appear individually or occasionally together—though it'...
2007 FJ Cruiser | P0137P0300 Random Misfire Diagnosis - 2003 Chevy Impala with 163,000 Miles
Hello everyone, I recently purchased a 2003 Chevrolet Impala for my daughter. The vehicle has accumulated 163,000 miles. I performed basic maintenance including replacing spar...
2003 Chevy Impala | P0300P0171 and P0174 Fault Codes on 1997 Ford F250 4x4 7.5L 460ci - Vacuum Leak Diagnosis
This is the second time I've encountered DTCs P0171 and P0174 on my 1997 Ford F250 4x4 with a 7.5L 460ci engine. The first instance occurred about two years ago when Ford replac...
1997 Ford F250 4x4 7.5l 460 ci | P0171P0135 O2 Sensor Fault on 1998 Mercury Tracer 2.0L LS - Check Engine Light, Idle Roughness and Stalling
I'm experiencing persistent engine issues on my 1998 Mercury Tracer 2.0L LS with 124,000 miles. Current Problems: 1. Check Engine Light is continuously illuminated — diagnostic...
Mercury Tracer | P0135Practical 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.