P162B 2015 GMC Sierra Code - Remote Vehicle Speed Limiting Signal Message Counter Incorrect
Quick Answer
When a remote slow-down request is sent from OnStar, the vehicle communication interface module sends a serial data message to the Engine Control Module (ECM) indicating that reduced vehicle speed has been requested. Common causes include Faulty Vehicle Communication Interface Module, Vehicle Communication Interface Module harness is open or shorted, Vehicle Communication Interface Module circuit poor electrical connection. 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
- P162B 2015 GMC Sierra indicates Remote Vehicle Speed Limiting Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Vehicle Communication Interface Module, Vehicle Communication Interface Module harness is open or shorted, Vehicle Communication Interface Module circuit poor electrical connection.
- 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 P162B 2015 GMC Sierra Description
The Diagnostic Trouble Code (DTC) will be set when the VIN embedded in the slow-down request does not match the VIN stored in the ECM or the rolling code counter embedded in the slow-down request does not increment for ten consecutive messages.
What are the Possible Causes of the DTC P162B 2015 GMC Sierra?
- Faulty Vehicle Communication Interface Module
- Vehicle Communication Interface Module harness is open or shorted
- Vehicle Communication Interface Module circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P162B 2015 GMC Sierra?
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 P162B 2015 GMC Sierra 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 P162B 2015 GMC Sierra Code
1. What are the common symptoms of OBDII code P162B in a 2015 GMC Sierra?
- Common symptoms include the check engine light coming on, decreased engine performance, and potential issues with the vehicle's speed limiting system.
2. What does the OBDII code P162B indicate in a 2015 GMC Sierra?
- This code indicates that the remote vehicle speed limiting signal message counter is incorrect, suggesting a problem with the vehicle's speed limiting system.
3. What are possible causes of the P162B code in a 2015 GMC Sierra?
- Possible causes include a faulty speed limiting module, wiring issues, software glitches, or communication errors between the modules in the vehicle.
4. How can I diagnose the P162B code in my 2015 GMC Sierra?
- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the speed limiting system components, checking for wiring faults, and testing the communication between modules.
5. Can I still drive my 2015 GMC Sierra with the P162B code present?
- It is not recommended to drive the vehicle with this code present, as it may affect the vehicle's performance and safety features related to speed limiting.
6. How can I repair the P162B code in my 2015 GMC Sierra?
- Repair options may include replacing the faulty speed limiting module, repairing any wiring issues, updating software, or reprogramming the modules to correct the message counter error.
7. Is the P162B code in a 2015 GMC Sierra a serious issue?
- While the severity may vary, it is important to address this code promptly to ensure proper functionality of the vehicle's speed limiting system and overall performance.
8. Can I reset the P162B code in my 2015 GMC Sierra myself?
- You can attempt to clear the code with an OBDII scanner, but it is crucial to diagnose and address the underlying issue causing the code to prevent it from reoccurring.
9. Will the P162B code cause my 2015 GMC Sierra to fail an emissions test?
- The presence of this code may cause your vehicle to fail an emissions test, as it indicates a fault that affects the vehicle's emissions control system.
10. How much does it typically cost to repair the P162B code in a 2015 GMC Sierra?
- Repair costs for this code can vary depending on the specific cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.
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