P098

Code PO98:

ISC Motor Circuit:

DESCRIPTION:
This diagnostic test monitors idle speed and gear selection from Park or Neutral to Drive or Reverse when the throttle is in ISC speed range. If idle speed is greater than desired, the PCM will retard the spark to reduce engine power and set Code P098.

TEST CONDITIONS:
Codes P021 and P022 not set.

FAILURE CONDITIONS:
1. Engine running for 5 seconds.

2. Gear selector moved from Park or Neutral to Drive or Reverse.

3. Engine rpm 600 greater than engine speed determined by the PCM (if Code P098 is already stored in history, use an RPM of 200 greater than determined byte PCM).

4. A throttle angle less than 20 degrees.

5. Vehicle speed less than 6 mph.

6. P/N to D/R fuel shut off not enabled.

ACTION TAKEN:
PCM retards ignition timing.