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2001 Pontiac Grand Am P0303 P0137 P0420 Diagnosis and Repair Guide
Hi everyone, I'm a new user here and am looking for help diagnosing issues with my 2001 Pontiac Grand Am. My engine runs roughly and feels unstable during operation. A diagnosti...
2001 Pontiac Grand Am | P01372001 New Beetle GLX 1.8T Misfire Codes P0340, P0352, P0300-P0304 & P1297/P0012: Diagnosing Root Cause for Turbo and Ignition Issues
I recently purchased a 2001 New Beetle GLX 1.8T and am experiencing multiple OBD-II diagnostic codes: P0340, P0352, P0300, P0302, P0301, P0303, P0304, P0102, and P1297 along wit...
2001 New Beetle GLX 1.8t | P00122007 Jeep Wrangler 3.8L P0303 Misfire: Spark, Compression, and Electrical Diagnosis
My friend has a stock 2007 Jeep Wrangler with a remanufactured 3.8L engine that has 15,000 miles on it. I installed the engine last fall, and it ran smoothly ever since. However...
2007 Wrangler | P03032000 Ford Focus P0303 P0304 P0171 P0172 P1132 - Engine Stalls, Loses Power on Warm Days
2000 Ford Focus 2.0L MFI DOHC 4-cylinder, 184,000 miles My 2000 Ford Focus is experiencing intermittent power loss and stalling, especially on warm days (air temperature above ...
2000 Ford Focus | P01712004 PT Cruiser Check Engine Light with Code P0303: Misfire in Cylinder 3 - Running Fine at 112,000 Miles
The check engine light turned on in my 2004 PT Cruiser, and after scanning at a local auto parts store, I received diagnostic code P0303 — indicating a misfire in cylinder 3. De...
04 PT Cruiser | P03032003 Mitsubishi Eclipse P0303 Misfire on Cylinder 3 - Diagnosis and Repair Guide
My 2003 Mitsubishi Eclipse 4-cylinder is showing a misfire on cylinder 3, as confirmed by an OBD-II scanner. The auto parts store initially suggested the issue was caused by bad...
2003 Mitsubishi Eclipse | P03032007 Dodge Charger 2.7L V6 Multiple Misfires: What to Do After Replacing Spark Plugs, Coil Packs, and Fuel Pump
I own a 2007 Dodge Charger with a 2.7L V6 engine that is experiencing multiple misfires. I've already replaced the spark plugs, coil packs, fuel pump, and crankshaft position se...
2007 Dodge Charger 2.7L V6 | P0300P0303 Misfire Diagnosis and Repair for 2010 Chrysler Town & Country SE
I own a 2010 Chrysler Town & Country SE with a 3.3L engine. The vehicle is showing a P0303 misfire code. I have already replaced all spark plugs, ignition wires, the coil pack, ...
2010 Caravan | P0303Chevrolet Prism P0303 OBD2 Code: Cylinder 3 Misfire Diagnosis
I'm experiencing a Check Engine Light on my Chevrolet Prism, and the diagnostic code displayed is P0303. This code indicates a misfire in cylinder 3 of the engine. A misfire in ...
Chevrolet Prism | P03032007 Hyundai Santa Fe P0300, P0303, P0305, 2A00 and 2196 - Diagnosis and Repair Guidance
My girlfriend recently experienced severe running issues with her 2007 Hyundai Santa Fe 3.3L engine. The vehicle would run roughly at times, then suddenly become stable again. A...
2007 Hyundai Santa Fe | P03002005 Chevrolet Silverado 4.3L V6 with P0200 and P0303 Codes - Diagnosis and Repair Guidance
I own a 2005 Chevrolet Silverado Regular Cab with a 4.3L V6 engine, currently at 188,000 miles. The truck has been sitting for approximately two years. After refilling the fuel ...
2005 silverado v6 | P02002003 Mitsubishi Eclipse GTS OBD2 Codes P0150, P0154, P0155, P0156, P0161 and P0303 - O2 Sensor & Cylinder 3 Misfire Diagnosis
My 2003 Mitsubishi Eclipse GTS (112,000 miles) is showing multiple OBD2 fault codes: P0150, P0154, P0155, P0156, P0161, and a cylinder 3 misfire code (P0303). The vehicle has be...
2003 Mitsubishi Eclipse GTS | P01502003 Chevy Venture P0303 Misfire and P0141 O2 Sensor Fault - How to Diagnose and Fix
My 2003 Chevrolet Venture is showing a flashing Check Engine Light with two fault codes: P0303 (cylinder #3 misfire) and P0141 (downstream oxygen sensor circuit malfunction). I'...
2003 Chevy Venture | P0141P0303 Fault Diagnosis and Repair for 1998 GMC Sonoma 2.2L SFI Engine
Hello everyone! I recently purchased a 1998 GMC Sonoma 2.2L SFI engine with 67,000 original miles at a great price, but it wouldn't start initially. After using a code reader, t...
1998 GMC Sonoma 2.2L | P03032006 Jetta 2.5L Multiple Misfire Code: Causes and Diagnostic Tips
My 2006 Jetta 2.5L is showing a multiple misfire code across all five cylinders, specifically when the engine is running below 1500 RPM. As soon as revs increase, the engine run...
2006 New Jetta 2.5 | P03002010 Chevy Aveo P0303 Fault: Cylinder 3 Misfire - Diagnosis and Fixes
I currently own a 2010 Chevrolet Aveo and am experiencing engine code P0303, indicating a misfire in cylinder 3. I've already replaced the spark plugs, but the issue persists. T...
2010 Chevy Aveo | P03032002 Ford Taurus P1131, P0316, P0303, P0174 & P0171 Codes: Misfire, Lean Mixtures and Poor Acceleration Diagnosis
I'm experiencing multiple engine trouble codes on my 2002 Ford Taurus: P1131, P0316, P0303, P0174, and P0171. The check engine light flashes intermittently while driving instead...
2002 Ford Taurus | P01712006 Ford F150 5.4L Engine Rough Idle with P0016, P0174, and P0303 Codes After Spark Plug Replacement
I recently had to remove the cylinder head on Bank 1 to extract a broken spark plug. After reassembling the engine, my 2006 Ford F150 5.4L is now running with a very rough idle....
2006 Ford F150 | P0016P0303 Fault in 2004 Chevrolet Impala: Diagnosis and Solutions
My 2004 Chevrolet Impala got stuck in snow and I revved the engine, but it did not overheat. Now the check engine light is showing code P0303, and the vehicle runs roughly. I al...
2004 Chevy Impala | P0303