Diagnostic Aids

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

Excessive vibration from sources other than the engine could cause DTC P0300 to set. The following are possible sources of vibration:
- Thickness variation of the brake rotors-Refer to Symptoms - Hydraulic Brakes .
- The drive shaft not balanced-Refer to Vibration Analysis - Driveline .
- Worn or damaged accessory drive belt-Refer to Symptoms - Engine Mechanical .
There may be more or less cylinders actually misfiring than indicated by the scan tool.