AutoCodesGeneric – P1630

P1630 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 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 44,753
How popular is this code, among other codes? Medium
Table of contents Created and updated by William Orellana on Sep 15, 2022
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Code P1630 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 - Theft Deterrent Learn Mode Active - AutoCodes.com
P1630 Code - Theft Deterrent Learn Mode Active

What are the Possible Causes of the DTC P1630?

  • Reprogram Theft Deterrent System Components

How to Fix the DTC P1630?

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 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 code?

Need more information on how to fix the P1630 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1630 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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.

Frequently Asked Questions about P1630 Code

1. What does the OBDII code P1630 mean?

The P1630 code indicates that the vehicle's theft deterrent system is in "learn mode," which may prevent the engine from starting.

2. What are the common symptoms of the P1630 code?

Common symptoms of the P1630 code include the engine not starting, the security light flashing or staying illuminated, and the vehicle going into anti-theft mode.

3. What can cause the P1630 code to trigger?

The P1630 code can be triggered by issues with the key fob, the ignition key, the anti-theft system, or a faulty immobilizer module.

4. How can I diagnose the P1630 code?

Diagnosing the P1630 code typically involves checking for other related trouble codes, inspecting the key fob and ignition key, and testing the anti-theft system components.

5. How do I repair the P1630 code?

Repairing the P1630 code may involve reprogramming the key fob, reprogramming the immobilizer module, or replacing faulty anti-theft system components.

6. Can I drive my vehicle with the P1630 code?

It is not recommended to drive your vehicle when the P1630 code is present, as the engine may not start or could stall unexpectedly due to the anti-theft system being in learn mode.

7. How much does it cost to fix the P1630 code?

The cost of fixing the P1630 code can vary depending on the underlying cause. Reprogramming key fobs or modules may be less expensive than replacing components.

8. Can I reset the P1630 code myself?

Resetting the P1630 code may be possible by performing a hard reset on the vehicle's computer system, but it is recommended to have a professional diagnose and repair the issue to prevent future occurrences.

9. How long does it take to repair the P1630 code?

The repair time for the P1630 code can vary based on the specific cause of the issue. Simple reprogramming tasks may take less time, while component replacements could require more labor.

10. Is the P1630 code a serious issue?

The P1630 code is not typically considered a serious issue in terms of vehicle safety, but it can be inconvenient if the vehicle does not start due to the theft deterrent system being in learn mode.

Discuss the causes and fixes for P1630 OBDII Code

  • I have a Volvo XC70 wagon, The accy was left in the on position and battery went dead. Upon completion of jump start the Check Engine light was on. I Plugged in OBDII reader and got code P1630, erased code and light went off.

  • On a Isuzu KB300 TDI 2003 Eng.No. 4JH1921793
    Barrery run flat and after changing battery, engine just cranks and wont starts. No fuel to injectors. Engine light stays on and Error code = P1630

    Can anyone advice how to cansel and reset it pls.

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