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.
Acura RSX P1078 and P0420 Diagnostic: Causes, Fixes, and Intake Manifold Issues
I own a 2002 Acura RSX with the Check Engine Light illuminated. After visiting AutoZone, I received diagnostic codes P1078 and P0420. The technician suggested replacing the inta...
Acura RSX | P04202004 Mazda MPV P0102 OBD2 Code: Causes and Troubleshooting Guide
My check engine light turned on last night. I took the vehicle to AutoZone, where they provided a diagnostic printout showing code P0102 along with four potential causes. I'm lo...
2004 Mazda MPV | P0102P0117 Fault Code on 1996 Mercury Grand Marquis: Fix and Gauge Issues
I recently replaced the Engine Coolant Temperature (ECT) sensor with code P0117 on my 1996 Mercury Grand Marquis, but the check engine light remains illuminated. Additionally, t...
1996 Mercury Grand Marquis | P01172003 Mitsubishi Lancer P0117 Fault Code: Causes and Solutions
I'm experiencing an OBD2 fault code P0117 on my 2003 Mitsubishi Lancer. The code indicates a sensor circuit malfunction in the engine coolant temperature sensor, which is causin...
2003 Mitsubishi Lancer | P01172004 GMC Envoy P0106 Code: Running Fine But Emissions Fail - What's Causing This?
I have a 2004 GMC Envoy with a 4.2L engine. Recently, I received a P0106 diagnostic trouble code (DTC), which indicates an intake manifold absolute pressure (MAP) sensor circuit...
04 GMC | P01062002 Jeep Liberty P0551 Code: Power Steering Pressure Sensor Issue and Diagnosis
I own a 2002 Jeep Liberty with a persistent P0551 diagnostic trouble code that prevents me from passing vehicle inspection. I've already replaced the power steering fluid and th...
jeep liberty | P05512006 Dodge Stratus 4-Cylinder Engine P0301 Misfire: Diagnosis, Repair Attempts & PCM Programming Issues
I've been experiencing recurring engine misfire issues with my 2006 Dodge Stratus since November. The problem consistently shows up with a blinking Check Engine Light and engine...
2006 Dodge Stratus | P03012002 Hyundai Elantra 2.0L - P0138 O2 Sensor Code Reappears After Replacement
After clearing the P0138 fault code and replacing the oxygen sensor, why does the check engine light return with the same code? The vehicle is a 2002 Hyundai Elantra 2.0L, and I...
2002 Hyundai Elantra 2.0 | P01382002 Chrysler Town & Country 3.3L V6: P0134 O2 Sensor No Activity Code After Replacement
Hi everyone, I'm new here and hoping to get some help with a recurring O2 sensor issue on my 2002 Chrysler Town & Country 3.3L V6 engine. The Check Engine Light came on, and af...
2002 Chrysler Town & Country | P0136P0306 Fault on 1990s Chevrolet S10: How to Clear the Code After Replacing All Components
I'm unable to clear the P0306 diagnostic trouble code (DTC) on my 1990s Chevrolet S10. I've already replaced the spark plugs, plug wires, distributor cap and rotor, fuel injecto...
chevy s10 | P0306Mitsubishi Outlander P0431 O2 Sensor Fault: Bank 2 Location and Diagnosis Guide
I'm starting a new thread regarding my Mitsubishi Outlander's O2 sensor issue, specifically fault code P0431. I'd like to understand the correct location of the oxygen sensors f...
Mitsubishi | P04312004 Mazda 6 2.3L Engine Misfire with Rich Mixture Smell - OBD Code $07E8/$07E9
My 2004 Mazda 6 2.3L is experiencing engine misfiring and a strong rich mixture odor. The diagnostic tool shows codes $07E8 and $07E9. I'm concerned about whether these are stan...
2004 Mazda 6 | P0300P0411 Secondary Air Flow Fault - 2006 Pontiac Grand Prix (3.8L N/A) | O2 Sensor & Heater Resistance Issues
New member here — apologies for the long post, I'm trying to understand what's causing this recurring issue on my 2006 Pontiac Grand Prix with a 3.8L naturally aspirated engine....
Grand Prix | P0411P0496 Diagnostic and Purge Valve Location for 2003 Chevrolet Tracker 2.5L V6
OBD2 Fault Code P0496 detected on a 2003 Chevrolet Tracker with a 2.5L V6 engine. Seeking guidance on the location of the evaporative emission purge valve and troubleshooting st...
2003 Chev Tracker | P0496Practical 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.