P0883 TCM Power Input Signal High

P0883 indicates high TCM power input signal. The transmission controller sees supply voltage above the expected range.

Code details

Generic OBD-II · P0

System: Transmission
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not keep driving with overvoltage present; excessive system voltage can damage modules and transmission electronics.

Symptoms of P0883

Harsh, delayed, or slipping shifts, or being stuck in one gear.
Check-engine light, sometimes with limp-home mode.
Flaring RPM or a shudder under load.

Common causes of P0883

Low or degraded transmission fluid.
A failing speed sensor, shift solenoid, or pressure-control circuit.
Wiring, connector, or internal hydraulic/mechanical faults.

Useful checks before replacing parts

Measure charging voltage at the battery and TCM power feed under idle, load, and road-test conditions.
Inspect alternator control, battery condition, voltage-sense wiring, grounds, relay output, and TCM connector condition.
Review overvoltage, communication, and module-performance codes that may share the same charging-system fault.

Related OBD-II codes

These nearby transmission entries can help compare wording and pin down the fault area.