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P0D77 Powertrain

A/C Compressor Control Module Output Driver Temperature Sensor Circuit High

The ECM detects a high fault on the a/c compressor control module output driver temperature sensor circuit. Reading cannot be used reliably for control.

Affected components

  • Ac compressor cm output driver temp sensor
  • Wiring harness
  • Ac compressor module

Common causes

  • High likelihood: Signal wire shorted to B+
  • Medium likelihood: Open sensor
  • Low likelihood: Connector pins corroded - high contact resistance

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • Reduced-power or limp mode may occur

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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