AutoCodes – Pontiac – P1629 Pontiac

P1629 Pontiac Code - Theft Deterrent Start Enable Signal Not Received

Quick Answer

The Engine Control Module (ECM), the Powertrain Interface Module (PIM), and the Body Control Module (BCM) are an integral part of the vehicle theft deterrent system. Common causes include Deterrent key not programmed to vehicle, Faulty Deterrent key, Faulty ignition switch. 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: P1629 Pontiac indicates Theft Deterrent Start Enable Signal Not Received.
Common causes: Common causes include Deterrent key not programmed to vehicle, Faulty Deterrent key, Faulty ignition switch.
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 11,699

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 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1629 Pontiac Description

The Engine Control Module (ECM), the Powertrain Interface Module (PIM), and the Body Control Module (BCM) are an integral part of the vehicle theft deterrent system. The theft deterrent system authenticates the security code programmed into each of these modules to prevent unauthorized vehicle operation. This authentication process includes the following steps:
1.When the ignition is turned ON or the door is unlocked by remote key the BCM and the key exchange security data to verify the correct key is used.
2.Once the correct key has been confirmed and the ignition is turned ON, the PIM and BCM exchange data to confirm the correct BCM and PIM are being used.
3.Once the correct key, BCM, and PIM are confirmed, the PIM and ECM exchange data to allow the vehicle to start.
4.The data exchange processes conducted use various encrypted data exchanges between each of the devices.

OBDII Code P1629 Pontiac - Theft Deterrent Start Enable Signal Not Received - AutoCodes.com — P1629 Pontiac Code - Theft Deterrent Start Enable Signal Not Received

What does this mean?

What are the Possible Causes of the DTC P1629 Pontiac?

Deterrent key not programmed to vehicle
Faulty Deterrent key
Faulty ignition switch
Poor electrical connection for Deterrent circuit components

How to Fix the DTC P1629 Pontiac?

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 P1629 Pontiac 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.

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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.

Frequently Asked Questions about P1629 Pontiac Code

What does the OBDII code P1629 mean on a Pontiac?

The P1629 code indicates that the Theft Deterrent Start Enable Signal was not received, preventing the engine from starting due to an issue with the vehicle's security system.

What are the common symptoms of the P1629 code in a Pontiac?

Symptoms include the engine not starting, security light staying on or flashing, and possible intermittent starting issues.

What causes the P1629 code to appear in a Pontiac?

The code can be triggered by a faulty ignition switch, a malfunctioning passlock sensor, damaged wiring in the security system, or a problem with the body control module (BCM).

Can I drive my Pontiac with the P1629 code?

No, the vehicle may not start or could experience intermittent starting issues, making it unreliable to drive until the problem is resolved.

How do I diagnose the P1629 code on a Pontiac?

Start by checking for related codes, inspecting the ignition switch and wiring, testing the passlock sensor, and verifying the communication between the BCM and the engine control module (ECM).

How do I fix the P1629 code on a Pontiac?

Repairs may include replacing the ignition switch, repairing or replacing damaged wiring, reprogramming the passlock system, or replacing the body control module (BCM).

What tools are needed to troubleshoot the P1629 code?

Youâ€™ll need an OBDII scanner, a multimeter to test electrical connections, and possibly specialized tools for reprogramming the security system.

Does the P1629 code require reprogramming after repairs?

Yes, if components like the ignition switch or BCM are replaced, the passlock security system may need to be reprogrammed to sync with the new parts.

Can a dead battery cause the P1629 code in a Pontiac?

A dead or weak battery can sometimes disrupt the communication between security system components, potentially triggering the P1629 code.

How much does it cost to fix the P1629 code on a Pontiac?

Repair costs vary but may range from $100 to $500, depending on whether components like the ignition switch or BCM need replacement and if reprogramming is required.