P0802low severityPowertrain
Transmission MIL Request Circuit Open
on 1994-2007 Dodge Ram 2500 5.9L I6 Cummins Diesel · 4WD
What this code means
An open circuit was detected in the line the transmission control module uses to request the malfunction indicator lamp. This can prevent proper illumination of transmission fault warnings.
Symptoms
- MIL may not illuminate for trans faults
- Warning lamp behavior abnormal
- Related transmission codes stored
Common causes
- Open wiring in MIL request circuit
- Corroded or loose connector
- Faulty TCM output driver
- Instrument cluster fault
Diagnostic steps
- Retrieve all stored codes
- Inspect MIL request wiring for opens
- Check TCM and cluster connectors
- Test continuity between TCM and cluster
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