DTC EFI-666

6-6-6 DTC IN TRANSMISSION CONTROL MODULE

Trouble Code Conditions
This diagnostic trouble code (DTC) indicates whether there are one or more emission-related diagnostic trouble codes stored in the transmission control module (TCM). Diagnostic trouble code EFI-666 is stored 2 seconds afier the automatic transmission control module requests malfunction indicator lamp (MIL) lighting from the Motronic 4.4 engine control module (ECM).

Substitute value(s)
- None.

Possible source(s)
- One or more diagnostic trouble codes stored in automatic transmission control module.

Fault symptom(s)
- Varies depending on the diagnostic trouble code stored in the automatic transmission control module.

Fault symptom(s)
Fault-tracing in automatic transmission:
- Read off diagnostic trouble codes from automatic transmission and Fault-trace.