P1631 2016 GMC Sierra Code - Theft Deterrent Start Enable Signal Not Correct
Quick Answer
The P1631 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the Theft Deterrent Start Enable Signal is not correct. Common causes include Faulty key fob or transponder key, Malfunctioning theft deterrent module, Wiring issues in the theft deterrent system. 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
- P1631 2016 GMC Sierra indicates Theft Deterrent Start Enable Signal Not Correct.
- Common causes
- Common causes include Faulty key fob or transponder key, Malfunctioning theft deterrent module, Wiring issues in the theft deterrent system.
- 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 P1631 2016 GMC Sierra Description
The P1631 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the Theft Deterrent Start Enable Signal is not correct. This code is related to the vehicle's anti-theft system, which is designed to prevent unauthorized individuals from starting the vehicle. When this code is triggered, it means that the signal sent by the theft deterrent system is not being recognized or is incorrect, preventing the vehicle from starting.
Common Causes of P1631 2016 GMC Sierra
- Faulty key fob or transponder key
- Malfunctioning theft deterrent module
- Wiring issues in the theft deterrent system
- Faulty ignition switch
- Issues with the engine control module (ECM)
Symptoms of P1631 2016 GMC Sierra
- Engine cranks but does not start
- Security light flashing on the dashboard
- Inability to start the vehicle with the key or push-button start
- Vehicle going into anti-theft mode and not starting
How to Fix P1631 2016 GMC Sierra
- Check the key fob or transponder key for proper functioning. Replace the key if necessary.
- Inspect the theft deterrent module and wiring for any damage or loose connections. Repair or replace as needed.
- Test the ignition switch for proper operation. Replace if faulty.
- Scan the vehicle's ECM for any stored codes related to the theft deterrent system. Clear the codes and reprogram the system if necessary.
- Perform a relearn procedure for the theft deterrent system to ensure proper communication between the key and the vehicle's computer.
Cost to Fix P1631 2016 GMC Sierra
The cost of repairing a P1631 code on a 2016 GMC Sierra 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 $300. Overall, the total cost of repairing this issue can range from $200 to $800. It is important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the specific repair shop. It is recommended to consult with a professional mechanic to get an accurate cost estimate for this repair.
Tech Notes for P1631 2016 GMC Sierra
-Insert the key, attempt to start the vehicle, and leave the key in the ON position.
In some vehicles, the Battery and Security light will blink for several seconds, and then shut off. Then the Security light will then remain ON. Leave the ignition ON until the Security light goes OFF. This will take more than 5 mins.
-When the Security light goes OFF, turn the ignition to the OFF position.
-Leave ignition OFF for 20 Seconds.
-Attempt to start the vehicle again and leave the key in the ON position.
-In some vehicles, the Battery and Security light will blink for several seconds, and then shut off. Then the Security light will then remain ON. Leave the ignition ON until the Security light goes OFF. This will take more than 5 mins.
-Turn the ignition to the OFF position for 20 Seconds.
-Attempt to start the vehicle again and leave the key in the ON position.
-In some vehicles, the Battery and Security light will blink for several seconds, and then shut off. Then the Security light will then remain ON. Leave the ignition ON until the Security light goes OFF. This will take more than 5 mins.
-Once this entire procedure has been completed (three times) your vehicle will start on the fourth attempt.
Note: Some vehicles perform the relearn in a different sequence. You may notice your security light, battery light, and abs light will alternate. Once the security light is left out of the sequence that is considered one step. Repeat the procedure two more times and on the fourth time, your vehicle will start.
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Frequently Asked Questions about P1631 2016 GMC Sierra Code
1. What does OBDII code P1631 on a 2016 GMC Sierra mean?
The code P1631 indicates that the Theft Deterrent Start Enable Signal is not correct, potentially preventing the vehicle from starting.
2. What are the common symptoms of OBDII code P1631 on a 2016 GMC Sierra?
Common symptoms include the engine cranking but not starting, the security light flashing on the dashboard, and the vehicle going into anti-theft mode.
3. What are the possible causes of OBDII code P1631 on a 2016 GMC Sierra?
Possible causes include a faulty ignition key, issues with the ignition lock cylinder, a malfunctioning ignition switch, or problems with the vehicle's immobilizer system.
4. How can I diagnose OBDII code P1631 on a 2016 GMC Sierra?
Diagnosing this code typically involves checking the key for damage, ensuring it is the correct key for the vehicle, inspecting the ignition lock cylinder, and scanning the vehicle's computer for related trouble codes.
5. Can I still drive my 2016 GMC Sierra with OBDII code P1631 present?
If the vehicle is in anti-theft mode due to this code, it may not start or operate properly. It is recommended to address the issue before attempting to drive the vehicle.
6. How can I repair OBDII code P1631 on a 2016 GMC Sierra?
Repair options may include reprogramming the key, replacing a faulty key, repairing or replacing the ignition lock cylinder, or addressing any issues with the vehicle's immobilizer system.
7. Can I reset OBDII code P1631 on a 2016 GMC Sierra by disconnecting the battery?
While disconnecting the battery may clear some trouble codes temporarily, it is not a guaranteed fix for this specific issue. It's best to diagnose and address the root cause of the code.
8. Are there any DIY tips for troubleshooting OBDII code P1631 on a 2016 GMC Sierra?
DIY tips may include checking the key for visible damage, ensuring it is the correct key for the vehicle, and inspecting the ignition components for any obvious issues before seeking professional help.
9. How much does it cost to fix OBDII code P1631 on a 2016 GMC Sierra?
The cost of fixing this code can vary depending on the root cause of the issue, the needed repairs or replacements, and labor costs. It is advisable to consult a mechanic for a more accurate estimate.
10. Will OBDII code P1631 on a 2016 GMC Sierra affect the vehicle's performance?
If left unresolved, this code can prevent the vehicle from starting or operating properly, impacting its performance. It is important to address the issue promptly to avoid further complications.
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