Traditional gasoline car fault

1999 Honda Accord EX Misfire Diagnosis: P0300-P0304 and P1399 Codes Explained

I've reviewed numerous posts on this topic and tried various troubleshooting steps, but the issue persists. Vehicle: 1999 Honda Accord EX (standard model), 125,000 miles, regul...

99 Accord | P0300

2001 Ford F150 V6 P0171, P0174, P0303 Fault Diagnosis: Vacuum Leak and Coil Pack Issues

My 2001 Ford F150 V6 is experiencing severe engine shuddering at lower RPMs, especially in gears 3 and 4 with a manual transmission. The vehicle has triggered OBD-II diagnostic ...

2001 F150 V6 | P0171

1998 Subaru Forester PO301-PO304 Cylinder Misfire: Symptoms, Causes & Solutions

My 1998 Subaru Forester (2.5L DOHC, manual transmission) is showing intermittent cylinder misfire codes: PO301, PO302, PO303, and PO304 — appearing one at a time in sequence but...

SUBARU | P0300

P0420, P0400 and P0303 on 1999 Mistubishi Gallant ES

The Mitsubishi Gallant ES has 262,000 miles on it. Been getting the P0420 catalyst efficiency below threshold for about a year, year and a half. I know that's due to burning o...

1999 Mitsubishi Galant ES | P0303

99 Toyota 4Runner P0302 and P0301 Misfire Codes - Coil Pack or Injector Fault?

Freeze Frame Parameter Description Value DTC for which Freeze Frame was Stored P0302: Fuel System 1 Status - Closed Loop; Fuel System 2 Status - Not Supported; Calculated LOAD V...

99 4Runner | P0300

1999 Toyota Solara V6 Misfire Codes P0300-P0306, P0141, P0445: Diagnosis and Fixes for Stumbling and Power Loss

My friend's 1999 Toyota Solara V6 is experiencing severe stumbling and a noticeable lack of power. The vehicle is throwing multiple diagnostic trouble codes including P0300 (ran...

99 Toyota Solara V6 | P0141

1998 Honda CR-V (Prizm) P0441, P0446, P0304, P0303, P0300, P0301: Misfire & EVAP Codes Explained

My 1998 Honda Prizm runs smoothly when cold-started in chilly weather, but the check engine light stays on. After driving about 2 miles, the vehicle begins to run poorly—rough i...

98 Prizm | P0301

1999 Toyota Camry P0300 P0302 P0303 Fault: Check Engine Light Flashes, Codes Recur After Clearing

I own a 1999 Toyota Camry with 94,000 miles. The car runs smoothly and performs excellently under normal conditions—no hesitation or stalling. However, the check engine light be...

1999 Toyota Camry | P0300

1999 Toyota Camry 3.0L V6 Misfiring on Cylinders 1, 3, and 5 with P0300, P0301, P0303, P0305 Codes

My 1999 Toyota Camry 3.0L V6 is running sluggishly, with a smooth idle but poor performance under load. The vehicle is showing misfire diagnostic codes: P0300 (random misfires),...

1999 Camry 3.0 | P0301

P0303 on Jeep Liberty

I have a 2005 Jeep Liberty with the 3.7L and 40,000mi. We have owned it for 4 months now and will on occassion give me a cylinder #3 misfire. Just the other day though it gave m...

Jeep Liberty | P0303

P0303 Diagnostic and Solutions for 1997 Ford Expedition

I'm experiencing a P0303 fault code on my 1997 Ford Expedition. I've already replaced all spark plugs, ignition wires, the coil pack, and the fuel injector for cylinder #3. Desp...

1997 Expedition | P0303

1997 Chevy Tahoe P0303 Code: Cylinder 3 Misfire Diagnosis and Fixes

Hello! I'm new to this forum and seeking help with a persistent issue on my wife's 1997 Chevrolet Tahoe. The vehicle has 150,000 miles and is equipped with a 5.7L Vortec V8 engi...

1997 Chevy Tahoe | P0303

2001 Toyota Tacoma P0303 Code: Third Cylinder Misfire Diagnosis and Troubleshooting

I own a 2001 Toyota Tacoma 2WD with a 2.4L engine. The check engine light has come on, triggering a P0303 diagnostic code, which indicates a misfire in the third cylinder. This ...

toyota tacoma | P0303

P0300 P0302 P0303 1998 Toyota Tacoma Prerunner

Thanks in advance for all the help folks... I have a 1998 Toyota Tacoma Prerunner. It is the 4-cylinder model. 2 weeks ago it started shaking here and there, but not very notice...

1998 Toyota Tacoma Prerunner | P0300

2003 Pontiac Grand Prix 3100 V6 OBD P0303 Misfire: Diagnosis and Fix - Intake Lifter or Valve Spring Issue?

My friend's 2003 Pontiac Grand Prix with a 3.1L V6 engine has triggered OBD code P0303 (cylinder #3 misfire). We've already replaced the spark plug, ignition wire, and coil pack...

2003 Grand Prix | P0303

Random/Multiple Cylinder Misfire Detected - 2002 GMC Yukon XL Diagnosis and Solutions

2002 GMC Yukon XL 4WD The service engine light came on a few months ago. An auto parts store initially diagnosed a faulty O2 sensor, which I replaced—this resolved the issue tem...

2002 GMC Yukon XL | P0300

1999 Buick Regal P0303 and P0171 Codes: Misfire and Lean Mix Issue After Plug and Injector Replacement

I'm completely stuck with my supercharged 1999 Buick Regal. The vehicle is experiencing a misfire and has stored both P0303 (cylinder 3 misfire) and P0171 (system lean condition...

99 Buick Regal | P0171