GM OBD Trouble Code 46

Pass-Key II System Error - Circuit out of Frequency Range

The ECM receives a signal from the Pass-Key module. When the correct signal is received, the ECM will allow the engine to start and run. Please review the RepairPal article on the GM Pass-Key Anti-theft systems for more information.

Fault Code Description

  • 46 - Pass-Key II system error - circuit out of frequency range


  • Engine may not start

Common Problems

  • Faulty ignition lock cylinder

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