P06AE — Control Module Internal Temperature Sensor B Circuit High

P06AE: Control Module Internal Temperature Sensor B Circuit High — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

P06AE denotes a high electrical signal in the internal temperature sensor B circuit of a PCM, ECM or TCM. It does not necessarily indicate a physically high module temperature.

Affected system: Powertrain

Symptoms

  • Warning light may illuminate
  • Related system function may be impaired
  • Vehicle-specific symptoms vary

Possible causes

  • Implausible sensor or switch signal, poor ground, connector corrosion, or wiring damage
  • Related wiring, connector, power or ground fault
  • Vehicle-specific mechanical or control issue

What to check

  • Record stored and pending codes and freeze-frame data
  • Compare the named sensor or switch signal with actual operating conditions; inspect the connector, reference supply, ground and harness.
  • Confirm measured values against the vehicle service information
  • Retest under the conditions that set the code
  • Compare the named sensor or switch signal with actual operating conditions; inspect the connector, reference supply, ground and harness.
  • Repair the verified cause and confirm the code does not return

Also written as: P06AE-00, P06AE00, PO6AE (some scan tools add the fault-type byte, e.g. -00).