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2010 CADILLAC ESCALADE
6.2L V8•4WD•AUTOMATIC•gas
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor987Torque6748Fluid18DTC2446Battery2Maintenance0Recalls3
P1631high severityPowertrain

Theft Deterrent Start Enable Signal Not Correct

on 2010 Cadillac Escalade 6.2L V8 · 4WD

What this code means

The PCM received a start enable signal from the theft deterrent system, but the signal is not the expected value or pattern.

Symptoms

  • Vehicle will not start
  • Security light flashing
  • Engine cranks but does not fire

Common causes

  • Faulty key transponder
  • Passlock sensor sending incorrect signal
  • BCM internal fault
  • Wiring issue corrupting signal

Diagnostic steps

  1. Test theft deterrent signal at PCM
  2. Check key transponder
  3. Test Passlock sensor output
  4. Inspect wiring
  5. Attempt security relearn

Repair notes

Perform security relearn. Replace Passlock sensor or BCM if signal remains incorrect.

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