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.
Recurring P0420 Code on 1999 Honda Odyssey - O2 Sensor and Cat Replacement Issues
New user with difficulty posting in the correct section. Vehicle: 1999 Honda Odyssey LX, 94,000 miles. I recently performed a fuel injector cleaning to resolve a P0401 code. A...
'99 Odyssey | P0420Recurring PO420 Fault on 1999 Honda Odyssey - EGR and Exhaust System Diagnosis
1999 Honda Odyssey LX at 94,000 miles has been experiencing recurring PO420 fault. After a fuel injector cleaning initially resolved the PO402 code, a new PO420 appeared after j...
Honda Odyssey | P04202000 Jeep Grand Cherokee Limited 4.0L I6 Stalling with P1389 Code - No Auto Shutdown Relay Output Voltage at PCM
I own a 2000 Jeep Grand Cherokee Limited with a 4.0L I6 engine. Occasionally, when coming to a complete stop at a traffic light, the engine stalls and fails to restart. It typic...
Jeep | P1389P1580 Diagnostic for 1996 VW Jetta GL 2.0L: Causes and Solutions Without P0103
I'm currently seeing a P1580 diagnostic trouble code on my 1996 VW Jetta GL 2.0L, but I'm not getting a P0103 code. Is it possible to have a low battery voltage or charging syst...
96 jetta | P1580P-1684 Diagnostic for 2000 Dodge Neon 2.0L: Battery Disconnected in Last 50 Starts?
I'm troubleshooting a P-1684 diagnostic code on my son's 2000 Dodge Neon 2.0L engine. The code is P-1684, which according to the vehicle trouble codes section means 'Battery Dis...
2000 DODGE NEON 2.0 | P16842002 Dodge Durango OBD2 Code P0456: Causes, Fixes, and How to Clear It
I own a 2002 Dodge Durango with approximately 73,000 miles. Yesterday, when I started the vehicle, it displayed engine code P0456, which indicates a small leak in the evaporativ...
2002 DURANGO | P04562002 Dodge Durango Engine Code P0456: What It Means and How to Fix It
I own a 2002 Dodge Durango with approximately 73,000 miles. Yesterday, when I started the vehicle, it displayed engine code P0456, which indicates a small leak in the evaporativ...
2002 DURANGO | P04562002 Dodge Durango Engine Code P0456: Causes, Fix, and How to Clear the Fault
I own a 2002 Dodge Durango with approximately 73,000 miles. Yesterday, when I started the vehicle, it displayed engine code P0456, which indicates a small leak in the evaporativ...
2002 DURANGO | P0456P0420 Fault Code on 2002 GMC Sierra 1500 4WD: Causes, Meaning, and How to Troubleshoot
I'm experiencing a P0420 diagnostic trouble code (DTC) on my 2002 GMC Sierra 1500 4WD, which indicates 'Catalyst System Efficiency Below Threshold - Bank 1'. What does this mean...
2002 Suburban 1500 4wd | P04201998 Silverado P0430 Code: Catalyst System Efficiency Below Threshold - What Does It Mean and How to Fix?
When I drive up steep hills and floor the gas, my 1998 Chevrolet Silverado experiences misfiring, loss of power, and the 'Service Engine Soon' light flashes and remains on. A fe...
'98 silverado | P0430P1130 Diagnostic and Fix for 2001 Toyota Tacoma 4-Cylinder: How to Address Air/Fuel Sensor Circuit Issue
The check engine light on my 2001 Toyota Tacoma 4-cylinder came on about a month ago. I took it to a dealership friend who initially diagnosed the issue as a malfunctioning Mass...
2001 Toyota Tacoma 4cyl | P11301996 Chevrolet Z28 Auto: P0507 Code - Idle RPM Too High, Solutions & Fixes
I own a 1996 Chevrolet Z28 with an automatic transmission. The vehicle is currently displaying OBD-II diagnostic code P0507 (Idle Control System RPM Higher Than Expected). This ...
96Z28 | P0507P0340 Fault Code in 1997 Plymouth Voyager V6 - Is Cam Sensor Inside Distributor?
Hi everyone, my 1997 Plymouth Voyager V6 3.0 van suddenly dies after a few minutes of driving. The OBD2 fault code shows P0340, indicating a crankshaft or camshaft position sens...
plymouth voyager | P03401999 Mercury Sable P1131 Check Engine Light - How to Fix Without Spending $150 on O2 Sensors?
My 1999 Mercury Sable has the check engine light on, and I've pulled code P1131. After researching, I've tried replacing the mass air flow (MAF) sensor and gas cap—both new—but ...
1999 Mercury Sable | P1131P0401 on 97 Camry 4-cyl
Got the P0401 code for the first time a couple months back; disconnected battery to clear code, CEL went out and didn't come back on for a few weeks (including a 1000 mile round...
97 Camry 4-cyl | P0401P0300 Fault on 2003 Chevrolet Silverado 5.3L with Random Misfires in Cylinders 1,3,5,7
My 2003 Chevrolet Silverado 5.3L engine is showing a P0300 random misfire code when under hard acceleration above 3000 RPM. The check engine light flashes during high-load drivi...
03 Silverado 5.3L | P0300Dodge Ram 1500 Code P1391: Rough Running Engine Diagnosis & Fixes
My 1999 Dodge Ram 1500 with a 5.2L V8 engine is running rough and the issue has been getting progressively worse. I've already replaced the spark plugs, distributor cap, rotor, ...
dodge ram | P13912003 Ford Taurus P0191 Code: Fuel Rail Pressure Issue Causing Engine Sputter and Stall
I own a 2003 Ford Taurus 3.0L with 30,000 miles. The vehicle experiences rough idle and sudden engine stalling, especially during highway driving. After a 5-mile trip, the car s...
2003 Ford Taurus | P0191P1494 Diagnostic Code on 2000 Jeep Grand Cherokee: Cause and Location
I recently pulled up a diagnostic code P1494 on my 2000 Jeep Grand Cherokee. According to the trouble code, this indicates a leak detection pump switch issue. I'm trying to unde...
2000 Jeep Grand Cherokee | P1494Practical 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.