P0880
PowertrainTransmissionmoderate severityTCM Power Input Signal
What P0880 Means
The transmission control module is not seeing the expected power input signal. This usually points to a wiring or supply problem feeding the TCM.
Symptoms
- Erratic or harsh shifting
- Transmission warning light on
- Transmission may go into limp mode
Common Causes
- Corroded or loose TCM power connector
- Blown or weak fuse feeding TCM
- Damaged wiring to the TCM
- Faulty transmission control module
Diagnostic Steps
- Check and clean TCM power connectors
- Test fuse and power supply to TCM
- Measure voltage at TCM power input pin
- Inspect wiring harness for damage or shorts
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