For 1990-2009 cars only
Circuit Description
This DTC indicates that the ECM has been programmed with a frequency code that does not match the code in the Theft Deterrent Module.
Conditions for Running the DTC
Engine cranking
Conditions for Setting the DTC
The ECM has been programmed with a frequency code that does not match the code in the Theft Deterrent Module.
Action Taken When the DTC Sets
The ECM will not illuminate the malfunction indicator lamp (MIL).
Conditions for Clearing the MIL/DTC
| • | The DTC clears after forty consecutive warm-up cycles if no failures report by this diagnostic or any other non-emission related diagnostic. |
| • | The scan tool clears the MIL/DTC. |
Diagnostic Aids
| • | The wrong ignition key, or the use of a key without a transponder will cause this DTC to set as well as a no-start. |
| • | If the ECM and the Theft Deterrent Module have not been properly programmed, this DTC may set and the vehicle will not start. Refer to Theft Deterrent System in Engine Accessories for the programming instructions. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System check? | -- | Go to Diagnostic Aids |
