P1649 2018 Chevrolet Silverado Code - Immobilizer Security Code Not Programmed
Quick Answer
When learning the security code, as well as the challenge and response sequence, the Engine Control Module (ECM) is placed in learn mode. Common causes include Perform Engine Control Module Immobilizer Learn Procedure, Faulty Engine Control Module (ECM), Engine Control Module 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
- P1649 2018 Chevrolet Silverado indicates Immobilizer Security Code Not Programmed.
- Common causes
- Common causes include Perform Engine Control Module Immobilizer Learn Procedure, Faulty Engine Control Module (ECM), Engine Control Module 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 P1649 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC P1649 2018 Chevrolet Silverado?
- Perform Engine Control Module Immobilizer Learn Procedure
- Faulty Engine Control Module (ECM)
- Engine Control Module harness is open or shorted
- Engine Control Module circuit poor electrical connection
How to Fix the DTC P1649 2018 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1649 2018 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.
Need more information about the P1649 2018 Chevrolet Silverado code?
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Frequently Asked Questions about P1649 2018 Chevrolet Silverado Code
1. What does OBDII code P1649 on a 2018 Chevrolet Silverado mean?
The code P1649 indicates that the immobilizer security code is not programmed correctly in the vehicle's system.
2. What are the common symptoms associated with code P1649 in a 2018 Chevrolet Silverado?
Common symptoms include the vehicle not starting, the engine stalling immediately after starting, and the security light on the dashboard staying illuminated.
3. What can cause the immobilizer security code not to be programmed in a 2018 Chevrolet Silverado?
Possible causes of this issue include a faulty immobilizer control module, a problem with the key fob or key transponder, or issues with the vehicle's wiring.
4. How can I diagnose the problem related to code P1649 in my 2018 Chevrolet Silverado?
Diagnosing the issue typically involves using a professional OBDII scanner to read the specific code, checking the key fob or key transponder for any malfunctions, and inspecting the immobilizer control module and wiring for faults.
5. Can I fix the immobilizer security code programming issue in my 2018 Chevrolet Silverado myself?
While some basic troubleshooting steps can be taken, resolving the programming issue often requires specialized tools and knowledge. It is recommended to seek assistance from a qualified mechanic or dealership.
6. Are there any temporary solutions if my 2018 Chevrolet Silverado is experiencing code P1649?
In some cases, disconnecting the vehicle's battery for a few minutes and then reconnecting it may reset the system and temporarily resolve the issue. However, this may not be a permanent solution.
7. Is it safe to continue driving my 2018 Chevrolet Silverado with code P1649 present?
It is not recommended to drive the vehicle with an unresolved immobilizer security code programming issue, as it may lead to further complications, such as the vehicle not starting at all.
8. How much does it typically cost to repair the immobilizer security code programming problem in a 2018 Chevrolet Silverado?
The cost of repairing this issue can vary depending on the exact cause of the problem, parts needed for replacement, and labor costs. It is advisable to obtain a professional diagnosis for an accurate estimate.
9. Can a DIY enthusiast with automotive knowledge attempt to reprogram the immobilizer security code on a 2018 Chevrolet Silverado?
Reprogramming the immobilizer security code usually requires specialized equipment and expertise, making it a task best left to professionals with the necessary tools and training.
10. Will resetting the ECU (Engine Control Unit) help resolve code P1649 on a 2018 Chevrolet Silverado?
Resetting the ECU may clear some temporary error codes, but it is unlikely to resolve the specific issue related to the immobilizer security code programming. It is best to address the root cause of the problem for a lasting solution.
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