P1631 Chevrolet Code - Theft Deterrent Start Enable Signal Not Correct
Quick Answer
The P1631 Chevrolet code indicates that the theft deterrent system in the vehicle has detected an issue with the start enable signal, preventing the vehicle from starting. Common causes include Faulty ignition key or key fob, Malfunctioning ignition lock cylinder, Issues with the body control 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 Chevrolet indicates Theft Deterrent Start Enable Signal Not Correct.
- Common causes
- Common causes include Faulty ignition key or key fob, Malfunctioning ignition lock cylinder, Issues with the body control 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 Chevrolet Description
The P1631 Chevrolet code indicates that the theft deterrent system in the vehicle has detected an issue with the start enable signal, preventing the vehicle from starting. This system is designed to prevent unauthorized access to the vehicle and protect it from theft. When this code appears, it means that the signal required to enable the vehicle to start is not being received or is incorrect, leading to the vehicle being immobilized.
Common Causes of P1631 Chevrolet
- Faulty ignition key or key fob.
- Malfunctioning ignition lock cylinder.
- Issues with the body control module.
- Wiring or connection problems in the theft deterrent system.
- Tampering or attempted theft triggering the system.
Symptoms of P1631 Chevrolet
- Engine cranks but does not start.
- Security light on the dashboard remains illuminated.
- Vehicle does not respond to key fob or keyless entry system.
- Anti-theft system warning message displayed on the instrument cluster.
How to Fix P1631 Chevrolet
- Check and replace the ignition key or key fob if damaged or malfunctioning.
- Inspect and possibly replace the ignition lock cylinder if faulty.
- Scan the vehicle's computer for error codes and reset the system.
- Test the body control module and replace if necessary.
- Inspect wiring and connections in the theft deterrent system for any damage or corrosion.
Cost to Fix P1631 Chevrolet
The cost of repairing a P1631 Chevrolet code can vary depending on the specific cause of the issue and the labor rates in your area. Generally, the cost can range from $100 to $500, including parts and labor. It's recommended to consult with a professional mechanic to get an accurate estimate based on your vehicle's make and model.
Tech Notes for P1631 Chevrolet
-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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Information for Specific Chevrolet Models
- P1631 2014 Chevrolet Silverado — Theft Deterrent Start Enable Signal Not Correct
- P1631 2015 Chevrolet Silverado — Theft Deterrent Start Enable Signal Not Correct
- P1631 2016 Chevrolet Silverado — Theft Deterrent Start Enable Signal Not Correct
- P1631 2017 Chevrolet Silverado — Theft Deterrent Start Enable Signal Not Correct
- P1631 2018 Chevrolet Silverado — Theft Deterrent Start Enable Signal Not Correct
Frequently Asked Questions about P1631 Chevrolet Code
1. What are the common symptoms of OBDII code P1631 (Chevrolet) - Theft Deterrent Start Enable Signal Not Correct?
- Common symptoms include the vehicle not starting, the security light staying on, or the engine stalling shortly after starting.
2. What could cause the OBDII code P1631 to trigger on a Chevrolet vehicle?
- The code P1631 is often triggered by issues with the theft deterrent system, such as a faulty ignition key, a damaged key transponder, or a problem with the Body Control Module (BCM).
3. How can I diagnose the cause of OBDII code P1631 on my Chevrolet?
- Diagnosis typically involves checking the ignition key and its transponder, inspecting the wiring and connections related to the theft deterrent system, and using a scan tool to retrieve additional diagnostic trouble codes.
4. Can I still drive my Chevrolet with OBDII code P1631 present?
- It is not recommended to drive the vehicle with the P1631 code active, as it may lead to starting issues or engine stalling, potentially leaving you stranded.
5. How can I reset or clear the OBDII code P1631 on my Chevrolet?
- Clearing the P1631 code usually requires fixing the underlying issue with the theft deterrent system, such as replacing a faulty key or repairing damaged wiring. Once the issue is addressed, the code can be cleared using an OBDII scan tool.
6. Is it possible to bypass the theft deterrent system to avoid OBDII code P1631 on my Chevrolet?
- Bypassing the theft deterrent system is not recommended, as it compromises the security of your vehicle and may lead to other issues down the line. It is best to address the root cause of the problem to ensure proper vehicle operation.
7. Can a DIY enthusiast repair OBDII code P1631 on a Chevrolet?
- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing the underlying cause of the P1631 code may require specialized tools and expertise. It is advisable to consult a professional mechanic for accurate diagnosis and repair.
8. How much does it cost to fix OBDII code P1631 on a Chevrolet?
- The cost of fixing the P1631 code can vary depending on the specific cause of the issue. It may involve replacing a key transponder, repairing wiring, or reprogramming the BCM. Costs can range from a few hundred to over a thousand dollars, including parts and labor.
9. Will disconnecting the battery reset OBDII code P1631 on a Chevrolet?
- Disconnecting the battery may temporarily clear the code, but it will likely return if the underlying issue with the theft deterrent system is not addressed. It is essential to diagnose and fix the root cause of the problem to prevent the code from reappearing.
10. How long does it take to repair OBDII code P1631 on a Chevrolet?
- The repair time for the P1631 code can vary depending on the specific cause of the issue and the complexity of the repair. It may take anywhere from a few hours to a full day to diagnose and fix the problem, so it's best to plan for some downtime if your vehicle is in need of repair.
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