P1629 GMC Code - Theft Deterrent Start Enable Signal Not Received
Quick Answer
The P1629 GMC code indicates that the theft deterrent system in the vehicle has not received the necessary signal to enable the engine to start. Common causes include Faulty theft deterrent module, Damaged wiring harness, Defective key fob. 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 GMC indicates Theft Deterrent Start Enable Signal Not Received.
- Common causes
- Common causes include Faulty theft deterrent module, Damaged wiring harness, Defective key fob.
- 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 P1629 GMC Description
The P1629 GMC code indicates that the theft deterrent system in the vehicle has not received the necessary signal to enable the engine to start. This system is designed to prevent the vehicle from being started without the correct key or key fob, thus deterring theft. This code usually points to a communication issue between the theft deterrent module and the engine control module. When this signal is not received, the vehicle's engine will be disabled, preventing it from starting.
Common Causes of P1629 GMC
- Faulty theft deterrent module
- Damaged wiring harness
- Defective key fob
- Malfunctioning engine control module
- Weak battery in the key fob
Symptoms of P1629 GMC
- Engine cranks but does not start
- Security light flashing on the dashboard
- Inability to start the engine with the correct key
- Vehicle going into anti-theft mode
- Loss of power to the ignition system
How to Fix P1629 GMC
- Perform a diagnostic scan to retrieve the trouble codes and identify the exact cause of the issue.
- Inspect the wiring harness for any damage or loose connections and repair as necessary.
- Check the key fob battery and replace if needed.
- Test the theft deterrent module and engine control module for proper operation and replace if faulty.
- Clear the trouble codes and perform a theft relearn procedure to reset the system.
Cost to Fix P1629 GMC
The cost of repairing a P1629 GMC code can vary depending on the specific cause of the issue. In general, the cost of parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $200. Overall, the total repair cost could range from $200 to $700. It's important to note that these are rough estimates and actual costs may vary based on location, vehicle make and model, and the specific diagnosis required. It is recommended to consult with a certified mechanic for a more accurate cost estimate. Labor rates at auto repair shops typically range from $80 to $150 per hour, but rates can be higher in certain areas or at dealerships.
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