P0883 – TCM Power High

Description

The ECM detects a high voltage condition in the TCM power circuit.

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Symptoms

  • Harsh shifting
  • Limp mode
  • No shift

Causes

  • Open circuit
  • Faulty alternator
  • Wiring issues

Diagnosis

  • Monitor TCM voltage
  • Inspect wiring
  • Check charging system

Repair

  • Repair wiring
  • Replace alternator

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