Conditions Which Generate This Code:
The ECM detects the following conditions:
• The vehicle speed signal changes more than 5 MPH on eight consecutive readings in three
seconds.
• The engine speed is greater than the programmed “VSL Protection” minus 100 rpm.
• The “VSL Protection” parameter is programmed to a value that is less than 2120 rpm.
Note: If the ABS is the source of the vehicle speed, the ABS must not be active.
System Response:
“DIAG” will be displayed next to the status for “Vehicle Speed” on the electronic service tool. The check engine lamp will illuminate.
Possible Performance Effect:
Engine rpm is limited to the programmed “VSL Protection” for eight seconds.
Troubleshooting:
Perform the following diagnostic procedure: “Vehicle Speed and Speedometer Circuit – Test”
Results:
• OK – STOP.
