Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
- { If equipped } Command the Cylinder Deactivation system On with a scan tool, then observe the misfire counters when commanding the system Off. If the misfire counters are incrementing, inspect for a sticking valve lifter.
- DTC P0300 may set when there is a condition with the component circuits: B52 Heated Oxygen Sensor
- High resistance in the circuits of the component may set DTC P0300 - P0304 without setting the DTC for the component: Q17 Fuel Injector
- If the condition is intermittent, wiggle the related wiring harnesses and connectors, with the ignition/vehicle on or engine running, while monitoring the scan tool circuit status parameters for the component. The parameters will display if there is a condition with the circuit or a connection.
- Verify the following conditions do not exist:
- Accessory drive bracket - Defective/Loose/Visible Damage
- Belt Driven Device - Defective/Loose/Visible Damage
- Brake Rotor - Excessive runout
- Drive Belt - Defective/Loose/Visible Damage
- Drive Shaft - Excessive runout
- During certain road conditions: Rough
- Tire and wheel assemblies which exhibit excessive runout can produce vibrations even if the assemblies are balanced.
- Transmission - Incorrect Operation