P0303 Diagnostic Trouble Code Discussion for December 2025
Cylinder 3 Misfire Detected
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| Help Request | Posted | |
| 2013 Cadillac ATS 2.0L Misfire VIN: 1G6AG5RX3D P0303: Misfire cylinder 3. The vehicle originally came in with a po303 code. we replaced the spark plugs in all cylinders and the #3 coil. after repair it idles perfectly, and on a short test drive drove perfect. A second test drive started the same. Perfect idle and smooth accelera... |
December 01, 2025 | |
| 2005 Ford Ranger Edge 4.0L Cuts out, Misfire, MIL Lamp on VIN: 1FTZR45EX5 P0303: 3 misfire. Vehicle came in with multiple oxygen sensor codes, misfire codes and bank 2 too rich and too lean. Watched fuel trims and bank 2 Long term was 25 short term would fluctuate between 40 and 68. Pulled spark plugs and they were very black on bank 2. Replaced ... |
December 15, 2025 |
