P1631 2015 Chevrolet Silverado Code - Theft Deterrent Start Enable Signal Not Correct
Quick Answer
The P1631 code on a 2015 Chevrolet Silverado indicates that the theft deterrent start enable signal is not correct. Common causes include Faulty ignition key or key fob, Malfunctioning immobilizer system, Defective 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
- P1631 2015 Chevrolet Silverado indicates Theft Deterrent Start Enable Signal Not Correct.
- Common causes
- Common causes include Faulty ignition key or key fob, Malfunctioning immobilizer system, Defective 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.
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Code P1631 2015 Chevrolet Silverado Description
The P1631 code on a 2015 Chevrolet Silverado indicates that the theft deterrent start enable signal is not correct. This means that the vehicle's security system is not receiving the proper signal to enable the engine to start. The theft deterrent system is designed to prevent unauthorized individuals from starting the vehicle, providing an additional layer of security. When this signal is not correct, the vehicle may not start or may experience issues related to the theft deterrent system.
Common Causes of P1631 2015 Chevrolet Silverado
- Faulty ignition key or key fob
- Malfunctioning immobilizer system
- Defective ignition switch
- Wiring issues in the theft deterrent system
- ECM communication problems
Symptoms of P1631 2015 Chevrolet Silverado
- Engine cranks but does not start
- Vehicle stalls while driving
- Intermittent starting issues
- Security light stays on or flashes
- Inability to turn the ignition key
How to Fix P1631 2015 Chevrolet Silverado
- Check for any loose or damaged wiring in the theft deterrent system and repair as necessary.
- Inspect the ignition key and key fob for any signs of damage or malfunction. Replace if needed.
- Test the immobilizer system to ensure it is functioning correctly. Repair or replace if necessary.
- Verify proper communication between the ignition switch, immobilizer system, and ECM. Address any communication issues.
- Clear the diagnostic trouble codes and perform a test drive to confirm that the issue has been resolved.
Cost to Fix P1631 2015 Chevrolet Silverado
The cost of repairing a P1631 code on a 2015 Chevrolet Silverado 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, while labor costs can range from $100 to $300. This brings the total estimated cost to between $200 and $800. It is important to note that diagnosis time and labor rates at auto repair shops can vary, so it is advisable to check with local shops for a more accurate estimate.
Tech Notes for P1631 2015 Chevrolet Silverado
-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 2015 Chevrolet Silverado Code
What does the OBDII code P1631 mean for a 2015 Chevrolet Silverado?
The OBDII code P1631 indicates that the theft deterrent start enable signal is not correct, which can prevent the vehicle from starting due to issues with the anti-theft system.
What are the common symptoms associated with the P1631 code?
Common symptoms include the vehicle failing to start, the security light illuminated on the dashboard, and intermittent starting issues.
What causes the P1631 code to trigger in a Chevrolet Silverado?
Causes can include a faulty ignition switch, issues with the key or key fob, problems in the wiring or connectors of the anti-theft system, or a malfunctioning body control module (BCM).
Can I drive my Silverado if the P1631 code is present?
It is not advisable to drive the vehicle if the P1631 code is present, as it indicates a potential issue with the vehicle's anti-theft system that could prevent it from starting.
How can I diagnose the issue related to the P1631 code?
Start by checking the key or key fob for damage, inspect the ignition switch and wiring, and use a scan tool to check for other related codes. Testing the BCM may also be necessary.
What repairs might be needed to fix the P1631 code?
Repairs may involve replacing a faulty ignition switch, reprogramming or replacing the key fob, repairing damaged wiring, or replacing the body control module.
Is it safe to clear the P1631 code without fixing the underlying issue?
Clearing the code without addressing the underlying issue is not recommended, as the problem will likely persist and keep the vehicle from starting.
Can the P1631 code reset itself after repairs?
Yes, the P1631 code may reset itself if the underlying issue is resolved and the vehicle is driven normally for a period of time.
Will disconnecting the battery clear the P1631 code?
Disconnecting the battery may clear the code temporarily, but it will not fix the underlying issue that caused the code to trigger in the first place.
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