P0881 – TCM Power Range/Performance

Description

The ECM detects a TCM power signal outside expected range.

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Symptoms

  • Harsh shifting
  • Limp mode
  • No shift

Causes

  • Weak power supply
  • Wiring issues
  • TCM failure

Diagnosis

  • Monitor TCM voltage
  • Inspect wiring
  • Check grounds

Repair

  • Repair wiring
  • Replace TCM

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