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.
P-0304 and P-0306 Misfire Codes in 2004 Ford Ranger: Is It a Production Issue or Fleet-Specific Failure?
I work for a company that previously operated a fleet primarily consisting of 2002–2006 Ford Rangers. Over the past several years, we've experienced recurring misfire codes P-03...
2004 ford ranger | P03041996 Mustang 4.6L DOHC with P0307 Code: Miss Fire on Cylinder 7 After Throttle Body Cleaning
Hello, I own a 1996 Mustang with the 4.6L DOHC engine and currently have 114,500 miles on it. Recently, the car started exhibiting a slight misfire and hesitation during operati...
96 Mustang | P03071999 Pontiac Bonneville Error Code P0304: How to Diagnose and Fix Ignition System Issues
NGK is an OEM supplier for many manufacturers, but that doesn't mean all aftermarket parts are equally reliable. While dealerships have never sold me faulty spark plugs in the p...
1999 Pontiac Bonneville | P0304P1757 Fault Explanation for 2000 Dodge Durango: What It Means and Should You Fix It?
I'm looking for clear, easy-to-understand advice about the P1757 diagnostic code on my 2000 Dodge Durango. In simple terms, what does this error mean? Is it something I can safe...
2000 Durango | P1757P-0300 and P-0304 Ford Explorer
Hi all! I am hoping someone might have some insight/specific experience with my problem... I have a 1999 Ford Explorer 5.0L AWD with 129K miles. I was at a red light last week w...
Ford Explorer | P03001998 Jetta TDI - Fault Code P1248: Cold Start Injector Control Difference
My 1998 Jetta TDI diesel engine won't start, and the only fault code detected is P1248. I'm concerned whether this code could be directly related to the starting issue. What doe...
1998 Jetta TDI | P12482002 Avalanche Z71 - P0303 and P1870: Transmission Slipping & Cylinder 3 Misfire Diagnosis
My 2002 Chevrolet Avalanche Z71 is showing two diagnostic trouble codes: P0303 (Cylinder 3 misfire detected) and P187-70 (Transmission slipping, as per Chilton's manual and OBD-...
AVALANCHE Z71 | P03031998 Mazda B4000 P0153 Fault Code: Vacuum or Exhaust Leak Diagnosis?
Hello, I recently purchased this 1998 Mazda B4000 truck. On the second day of ownership, it triggered a P0153 diagnostic code. After researching similar cases, two potential cau...
98 mazda b4000 | P0153P0440 OBD2 Code on 2002 Chevrolet Avalanche: Diagnosis and Solutions
I'm experiencing a P0440 EVAP system malfunction code on my 2002 Chevrolet Avalanche. I've already checked the fuel cap, and it appears to be in good condition. Could you please...
2002 Avalanche | P0440P0440 OBD Code on 1997 Pontiac Grand Am: Causes Car to Fail to Start After Shutting Off While Driving
1997 Pontiac Grand Am, V6 engine, rebuilt at 75,000 miles. I'm experiencing a P0440 diagnostic trouble code, which indicates an evaporation emissions system malfunction. My conc...
PONTIAC GRAND AM | P04401997 Dodge Caravan PO306 Misfire Diagnosis: Faulty Sensor or Valve Guide Issue?
NEED HELP I recently had my 1997 Dodge Caravan 3.0L engine diagnosed for a persistent PO306 misfire code. The previous mechanic replaced the spark plugs, distributor cap, rotor,...
97 dodge caravan | P0306P1689 Diagnostic and Fix for 2001 Dodge 3500 5.9L Diesel - Common Symptoms and Solutions
A 2001 Dodge 3500 5.9L diesel truck owner reports recurring P1689 trouble code, which indicates a throttle position sensor (TPS) signal issue. The vehicle exhibits symptoms such...
2001 dodge 3500 | P16891999 Pontiac Bonneville, Error Code P0304
Hey Guys, I am new to the forums, but have seen some really great information being passed along, and thought ya'll could help me out too! I have a 1999 Pontiac Bonneville with ...
1999 Pontiac Bonneville | P030498 Ford Ranger P0153 Code: Causes, Diagnosis & Fix for Rough Idle at 66,000 Miles
I'm not a DIYer, but I'm looking for advice on what service to request at my local garage. My 1998 Ford Ranger V6 3.0L automatic has been idling roughly lately and recently pass...
98 Ford Ranger | P0153P0118 OBD2 Diagnostic Code on 1997 Chevy S10 Pickup 4.3L V6 - How to Fix and Reset MIL
I own a 1997 Chevrolet S10 Pickup with a 4.3L V6 engine and a persistent P0118 OBD2 fault code. The check engine light (MIL) has not turned off despite replacing the intake mani...
S10 PU | P0118Practical 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.