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2023 CHEVROLET BOLT EUV
65 kWh Single Motor FWD•FWD•AUTOMATIC•ev
🏆Sponsored by Simon-Olivier Ricci
Repairs269Labor314Torque3680Fluid5DTC1608Battery1Maintenance0Recalls0
P0880moderate severityPowertrain

TCM Power Input Signal

on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD

What this code 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

  1. Check and clean TCM power connectors
  2. Test fuse and power supply to TCM
  3. Measure voltage at TCM power input pin
  4. Inspect wiring harness for damage or shorts
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