P1631 Chevrolet 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 Chevrolet 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 Chevrolet Description
What are the Possible Causes of the DTC P1631 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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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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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