P1631 2015 Chevrolet Silverado Code - Theft Deterrent Start Enable Signal Not Correct
Quick Answer
The Body Control Module (BCM) sends the pre-release information to the Engine Control Module (ECM) via the serial data circuit. Common causes include Perform security relearn procedure, Faulty Ignition switch assembly, Ignition switch assembly harness is open or shorted. 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 Perform security relearn procedure, Faulty Ignition switch assembly, Ignition switch assembly harness is open or shorted.
- 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.
Code P1631 2015 Chevrolet Silverado Description
What are the Possible Causes of the DTC P1631 2015 Chevrolet Silverado?
- Perform security relearn procedure
- Faulty Ignition switch assembly
- Ignition switch assembly harness is open or shorted
- Ignition switch assembly circuit poor electrical connection
How to Fix the DTC P1631 2015 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
-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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1631 2015 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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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