P0883
PowertrainTransmissionmoderate severityTCM Power Input Signal High
What P0883 Means
The TCM is seeing a power input voltage that is too high. This can be caused by a wiring short or charging system fault.
Symptoms
- Harsh or erratic shifts
- Transmission warning light on
- Possible limp mode
Common Causes
- Short to voltage in TCM wiring
- Overcharging alternator
- Faulty voltage regulator
- Faulty transmission control module
Diagnostic Steps
- Measure TCM power input voltage
- Check charging system output voltage
- Inspect wiring for shorts to power
- Replace TCM if supply is correct
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