P1631 2017 GMC Sierra Code - Theft Deterrent Start Enable Signal Not Correct
Quick Answer
The diagnostic trouble code P1631 for a 2017 GMC Sierra indicates that there is a problem with the Theft Deterrent Start Enable Signal not being correct. Common causes include Faulty key fob or key transponder, Malfunctioning ignition switch, Issues with the security system module. 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 2017 GMC Sierra indicates Theft Deterrent Start Enable Signal Not Correct.
- Common causes
- Common causes include Faulty key fob or key transponder, Malfunctioning ignition switch, Issues with the security system module.
- 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 2017 GMC Sierra Description
The diagnostic trouble code P1631 for a 2017 GMC Sierra indicates that there is a problem with the Theft Deterrent Start Enable Signal not being correct. This means that the vehicle's security system is not recognizing the correct signal to allow the engine to start. The theft deterrent system is designed to prevent unauthorized access to the vehicle and protect it from theft. When this code is triggered, it can result in the engine not starting or shutting off shortly after starting, causing inconvenience and potential safety concerns.
Common Causes of P1631 2017 GMC Sierra
- Faulty key fob or key transponder
- Malfunctioning ignition switch
- Issues with the security system module
- Wiring or connection problems in the theft deterrent system
- Battery voltage issues affecting the security system
Symptoms of P1631 2017 GMC Sierra
- Engine cranks but does not start
- Security light flashing on the dashboard
- Engine starts but immediately shuts off
- Inability to start the vehicle consistently
- Security warning messages displayed on the instrument cluster
How to Fix P1631 2017 GMC Sierra
- Check and replace the key fob battery or reprogram the key transponder.
- Inspect the ignition switch for any signs of wear or damage and replace if necessary.
- Scan the vehicle's computer system for any fault codes related to the security system and address them accordingly.
- Inspect the wiring and connections in the theft deterrent system for any damage or corrosion, repairing or replacing as needed.
- Reset the security system by following the manufacturer's recommended procedure.
Cost to Fix P1631 2017 GMC Sierra
The repair costs for addressing a P1631 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. However, a rough estimate for parts and labor could range from $100 to $500. Keep in mind that this is just an estimate, and the actual cost may be higher or lower depending on the extent of the repairs needed and the rates charged by the auto repair shop. It is recommended to consult with a qualified mechanic to get a more accurate estimate based on your specific situation.
Tech Notes for P1631 2017 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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