OBD Guide
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P1630

Theft Deterrent Learn Mode Active

P1630 is an OBD-II diagnostic trouble code meaning: Theft Deterrent Learn Mode Active. Common causes: replacing the ignition key, replacing the engine control unit (ecu). Estimated repair cost: ~$56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
~$56 (est.)

Symptoms

  • Engine won't start
  • The anti-theft indicator is flashing
  • No response when turning the key
  • Check Engine Light Is On

Causes

  • Replacing the ignition key
  • Replacing the Engine Control Unit (ECU)
  • Failure in the anti-theft system
  • Dead key battery
  • Immobilizer problems

How to Fix

  1. Check the condition of the battery in the ignition key
  2. Perform the key learning procedure according to the manual
  3. Check the wiring connections of the protection system
  4. Reset code using OBD-II scanner
  5. Contact your dealer to reprogram the system

Related codes

P1626P1631P1632

Error P1630 by Vehicle Brand

BuickCadillacChevroletGMGMCMazdaMercedes-BenzOldsmobileSaturnToyotaVolkswagen

FAQ

What does the P1630 code mean?

P1630 is an OBD-II diagnostic trouble code that indicates: Theft Deterrent Learn Mode Active

What causes a P1630 error code?

The most common causes of P1630 include: Replacing the ignition key; Replacing the Engine Control Unit (ECU); Failure in the anti-theft system; Dead key battery.

How do I fix a P1630 diagnostic trouble code?

To fix P1630: Check the condition of the battery in the ignition key. Perform the key learning procedure according to the manual. Check the wiring connections of the protection system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1630?

Yes, but get it checked soon

How much does it cost to fix P1630?

The estimated repair cost for P1630 is ~$56. Actual cost depends on your vehicle, location, and labor rates.

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