P1629 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 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.
Code P1629 Description
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.
What are the Possible Causes of the DTC P1629?
- 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?
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 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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Information for Specific Makes
- P1629 Audi — CAN Data Bus Cruise Control No Signal
- P1629 Buick — Theft Deterrent Start Enable Signal Not Received
- P1629 Cadillac — Theft Deterrent Start Enable Signal Not Received
- P1629 Chevrolet — Theft Deterrent Start Enable Signal Not Received
- P1629 GMC — Theft Deterrent Start Enable Signal Not Received
- P1629 Hyundai — Condenser Fan Circuit High
- P1629 Oldsmobile — Theft Deterrent Start Enable Signal Not Received
- P1629 Pontiac — Theft Deterrent Start Enable Signal Not Received
- P1629 Saturn — Theft Deterrent Start Enable Signal Not Received
- P1629 Volkswagen — CAN Data Bus Cruise Control No Signal
Frequently Asked Questions about P1629 Code
1. What are the common symptoms of OBDII code P1629 (Theft Deterrent Start Enable Signal Not Received)?
When this code is triggered, you may experience issues such as the engine not starting, the security light staying on, or the vehicle going into a no-start condition.
2. What can cause OBDII code P1629 to appear?
The most common causes of this code include a faulty ignition key, a problem with the key transponder, issues with the ignition lock cylinder, or a malfunction in the theft deterrent module.
3. How serious is OBDII code P1629?
This code is considered serious as it can prevent the vehicle from starting or cause it to stall unexpectedly. It is recommended to address this issue promptly to avoid being stranded.
4. How can I diagnose OBDII code P1629?
Diagnosing this code typically involves checking the ignition key, transponder, ignition lock cylinder, and theft deterrent module for any faults. A professional diagnostic scan tool may also be needed.
5. Can I drive my vehicle with OBDII code P1629 present?
It is not advisable to drive your vehicle with this code active, as it may lead to unexpected stalling or a no-start condition. It is best to address the issue before driving the vehicle.
6. How can I repair OBDII code P1629?
Repairing this code often involves replacing a faulty ignition key, fixing issues with the key transponder, repairing or replacing the ignition lock cylinder, or addressing problems with the theft deterrent module.
7. Can a DIYer fix OBDII code P1629?
While some aspects of diagnosing and repairing this code may be within reach of an experienced DIYer, it is recommended to seek professional help due to the complexity of the anti-theft system.
8. Will disconnecting the battery reset OBDII code P1629?
Disconnecting the battery may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return once the vehicle is driven again.
9. How much does it cost to fix OBDII code P1629?
The cost of fixing this code can vary depending on the specific cause of the issue and the labor rates of the repair shop. It is best to get a diagnostic assessment to determine the exact cost.
10. How long does it take to repair OBDII code P1629?
The repair time for this code can vary depending on the cause of the issue and the availability of parts. Some repairs may be completed in a few hours, while more complex issues may take longer to resolve.
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