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.
1996 Areo Star P0401 Code: Why Does It Appear Only Above Freezing?
Before attempting to remove the EGR valve—a task I suspect will be challenging on this 3.0L engine—I'm wondering if anyone else has encountered a P0401 code (Insufficient Exhaus...
96 Areo Star | P04011997 Hyundai Accent P0302 Misfire: Diagnosis and Fix with Cylinder 2 Exhaust Valve Warping
I recently purchased a 1997 Hyundai Accent SOHC 1.5 with 115,000 miles on the odometer. After connecting my OBDII scanner, I received fault code P0302, indicating a misfire in c...
1997 Hyundai Accent | P0302P0171 & P0174 Diagnostic Guide for 2000 Ford Windstar After Intake Manifold Gasket Replacement
Hello, I own a 2000 Ford Windstar with 70,000 miles. Two weeks ago, I had my intake manifold gasket replaced. Since then, the check engine light has come back on, and the diagn...
2000 Ford Windstar | P01711999 Toyota Avalon P1411 and P1410 Check Engine Light: What Does This Mean and What Should I Do?
I recently purchased a 1999 Toyota Avalon and as soon as we drove off the lot, the check engine light illuminated. I took it to AutoZone, where they diagnosed two trouble codes:...
1999 Toyota Avalon | P14102002 Pontiac Trans Am LS1 Misses Fire with P0300 and P0101: Open Circuit Fuel Overflow on Passenger Side
I own a 2002 Pontiac Trans Am with the LS1 engine. The vehicle is throwing fault codes P0300 (random misfire) and P0101 (mass air flow sensor circuit range/performance problem)....
LS1 | P0101P0171 and P0174, and then P0300 2000 Isuzu Rodeo
2 days ago I had P0171 and P0174 and the truck's idle was off with hesitation on acceleration response. I inspected the ducting from air filter and cleaned the MAF with contact...
2000 Isuzu Rodeo | P0171P0300 Multiple Cylinder Misfire Diagnosis for 1998 Sunfire 2.2L - Ignition, EGR, or Wiring Issues?
I own a 1998 Ford Sunfire with a 2.2L engine. Recently, the vehicle has started running very rough at idle, especially after prolonged driving. The issue occurs intermittently—s...
98 Sunfire 2.2L | P03002000 Silverado 1500 P0430 Code: Is It a Catalytic Converter or Oxygen Sensor Failure?
My 2000 Chevrolet Silverado 1500 failed an emissions test because the Check Engine Light was on and triggered code P0430 (Catalyst System Below Threshold - Bank 2). The truck id...
Silverado 1500 | P04302002 Chevrolet 5.3L VIN T - P0171, P0174, P0300: Lean Bank 1/2 & Misfire Issues | Cold Start Rough Idle
Help needed: Check Engine Light is on with fault codes P0171 (Lean Bank 1), P0174 (Lean Bank 2), and P0300 (Multiple Misfires). The vehicle exhibits a rough idle for approximate...
02 Chevy 5.3L | P01712002 Chevrolet 5.3L Engine P0171, P0174, P0300: Lean Mixtures and Misfires at Cold Start
I'm experiencing a Check Engine Light issue on my 2002 Chevrolet 5.3L V8 engine with fault codes P0171 (Lean Bank 1), P0174 (Lean Bank 2), and P0300 (Multiple Misfires). The veh...
02 chevy 5.3L | P01712004 Honda Accord P0171 Code: Causes, Diagnosis & Fix for Lean Mixtures After Cold Air Intake Installation
Hi everyone, I'm experiencing a recurring issue with my 2004 Honda Accord (4-cylinder K24A4) that's causing me serious concern. The check engine light has been flashing intermit...
Honda Accord | P01711997 Honda Civic P0441 Code: Common Causes and Fixes
I own a 1997 Honda Civic with an automatic transmission, and I'm currently experiencing the engine light coming on along with the P0441 diagnostic trouble code. Can anyone confi...
97 honda civic | P04411999 Honda Passport EX 4WD Stalls at Idle: P0102, P0171, P0174 Fault Codes - Diagnosis & Solutions
My daughter's 1999 Honda Passport EX with 4WD and fuel-injected 3.2L engine is experiencing intermittent stalling at idle, especially after the engine has warmed up. The issue o...
Passport, Rodeo | P0102Dodge Durango P1784 Code: Check Engine Light On, Transmission Shift Issues
The check engine light comes on in my Dodge Durango, and the vehicle feels like it's not shifting properly. I've been experiencing this issue where the truck seems to resist shi...
dodge durango | P17841994 Toyota Camry Transmission Failure: P0500 & P0720 Codes - Reverse Works, No Forward Gears
I'm experiencing serious transmission issues with my 1994 Toyota Camry. The vehicle will engage reverse gear (though not smoothly) but fails to shift into any forward gears. Dia...
1994 Toyota Camry | P0500PO747 and PO743 Fault Codes in 1999 Hyundai Elantra: Linked to Transmission Pressure Control Recall?
I recently received PO747 and PO743 diagnostic codes on my 1999 Hyundai Elantra. I'm aware of a recall related to the automatic transmission pressure control valve, and I want t...
1999 Hyundai Elantra | P0743Practical 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.