AutoCodes – GMC – P1630 GMC

P1630 GMC Code - Theft Deterrent Learn Mode Active

Quick Answer

The Body Control Module (BCM) sends the pre-release information to the Engine Control Module (ECM) via the serial data circuit. Common causes include Reprogram Theft Deterrent System Components. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1630 GMC indicates Theft Deterrent Learn Mode Active.
Common causes: Common causes include Reprogram Theft Deterrent System Components.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 5,272

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 15, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1630 GMC Description

The Body Control Module (BCM) sends the pre-release information to the Engine Control Module (ECM) via the serial data circuit. The ECM then sends a challenge to the BCM. Both the ECM and BCM perform a calculation on this challenge. If the calculated response from the BCM equals the calculation performed by the ECM, the ECM will allow the vehicle to start. The BCM follows this action by sending the remaining immobilizer data to the ECM. If the immobilizer data sent by the BCM matches that stored by the ECM, the ECM will allow the engine to remain running. The Diagnostic Trouble Code (DTC) will be set if the ECM receives incorrect immobilizer data from the BCM.

OBDII Code P1630 GMC - Theft Deterrent Learn Mode Active - AutoCodes.com — P1630 GMC Code - Theft Deterrent Learn Mode Active

What does this mean?

What are the Possible Causes of the DTC P1630 GMC?

Reprogram Theft Deterrent System Components

How to Fix the DTC P1630 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1630 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1630 GMC code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.