P1649 2017 Chevrolet Silverado Code - Immobilizer Security Code Not Programmed
Quick Answer
The P1649 diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates that the Immobilizer Security Code has not been programmed into the vehicle's system. Common causes include Incorrect programming of the immobilizer security code, Faulty key fob or transponder key, Malfunctioning immobilizer system components. 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
- P1649 2017 Chevrolet Silverado indicates Immobilizer Security Code Not Programmed.
- Common causes
- Common causes include Incorrect programming of the immobilizer security code, Faulty key fob or transponder key, Malfunctioning immobilizer system components.
- 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 P1649 2017 Chevrolet Silverado Description
The P1649 diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates that the Immobilizer Security Code has not been programmed into the vehicle's system. The immobilizer security system is designed to prevent unauthorized access to the vehicle by requiring a specific code or key fob to start the engine. When this code is not programmed, the vehicle will not start, and the engine will be immobilized.
Common Causes of P1649 2017 Chevrolet Silverado
- Incorrect programming of the immobilizer security code.
- Faulty key fob or transponder key.
- Malfunctioning immobilizer system components.
- Electrical issues affecting communication between the ECM and immobilizer system.
- Attempted theft or tampering with the vehicle's security system.
Symptoms of P1649 2017 Chevrolet Silverado
- Engine cranks but does not start.
- Security light on the dashboard remains illuminated.
- Inability to start the vehicle even with a valid key.
- Vehicle goes into anti-theft mode.
How to Fix P1649 2017 Chevrolet Silverado
- Verify the immobilizer security code has been correctly programmed into the vehicle's system.
- Check the key fob or transponder key for any damage or malfunctions.
- Inspect the immobilizer system components for any faults or wiring issues.
- Reset the immobilizer system and reprogram the security code if necessary.
- If needed, replace the key fob or any faulty components in the immobilizer system.
Cost to Fix P1649 2017 Chevrolet Silverado
The cost of repairing the P1649 code on a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of parts for this repair could range from $50 to $200, with labor costs adding an additional $100 to $200. However, it's important to note that labor rates at auto repair shops can vary significantly, with hourly rates typically ranging from $80 to $150. Additional diagnostic time may also be required to pinpoint the exact cause of the issue, potentially increasing the overall cost of the repair. It's recommended to consult with a trusted mechanic or dealership to get a more accurate estimate based on your location and vehicle specifics.
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Frequently Asked Questions about P1649 2017 Chevrolet Silverado Code
1. What does OBDII code P1649 mean on a 2017 Chevrolet Silverado?
P1649 indicates that the immobilizer security code has not been programmed or is not recognized by the vehicle's anti-theft system.
2. What are the common symptoms of code P1649 in a 2017 Chevrolet Silverado?
Common symptoms include the engine failing to start, the security light staying illuminated or flashing on the dashboard, and the inability to turn off the anti-theft system.
3. What causes the P1649 code to appear?
The main causes include a key fob or transponder that hasn’t been programmed, a faulty immobilizer system, or communication issues between the immobilizer and the engine control module (ECM).
4. Can a dead key fob battery trigger the P1649 code?
No, a dead key fob battery won’t cause this code, but it can prevent the vehicle from recognizing the key, leading to similar symptoms.
5. How is the P1649 code diagnosed on a 2017 Chevrolet Silverado?
A mechanic will use a scan tool to check for stored codes, inspect the key fob and transponder, verify the immobilizer system’s functionality, and ensure proper communication with the ECM.
6. How can I fix the P1649 code on my Silverado?
Fixes include reprogramming the key or immobilizer, replacing a faulty key fob or transponder, and addressing wiring or communication issues in the anti-theft system.
7. Can I reprogram the key myself to resolve the P1649 code?
Reprogramming the key often requires specialized tools and access to the vehicle’s security system, so it’s typically recommended to have a professional handle it.
8. Is it safe to drive with the P1649 code active?
No, vehicles with a P1649 code often won’t start due to the immobilizer system, so driving is not possible until the issue is resolved.
9. Does replacing the ECM fix the P1649 code?
Replacing the ECM may fix the issue if the ECM is faulty, but it will still need to be programmed to communicate with the immobilizer system.
10. How much does it cost to fix the P1649 code on a 2017 Chevrolet Silverado?
The cost varies depending on the issue, but reprogramming a key or immobilizer typically costs $100–$300, while replacing and programming an ECM could exceed $500.
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