Vehicle Speed/RPM Messages Missing (Active)

Tests 1 - 2:

SYMPTOM
VEHICLE SPEED/RPM MESSAGE MISSING (ACTIVE)

WHEN MONITORED
Every 8 seconds with the ignition ON.

SET CONDITION
This DTC is set if the ATC does not receive a vehicle speed or engine speed message within 8 seconds.

POSSIBLE CAUSES
- Check the PCM for any DTCS
- ATC - vehicle speed/RPM
- Powertrain control module