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P10BF 2016 GMC Sierra Code - Engine Coolant Bypass Valve Secondary Command Signal Message Counter Incorrect

Quick Answer

The P10BF diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Engine Coolant Bypass Valve Secondary Command Signal Message Counter being incorrect. Common causes include Wiring harness issues or electrical connection problems, Faulty engine coolant bypass valve, Malfunctioning engine control module (ECM). 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
P10BF 2016 GMC Sierra indicates Engine Coolant Bypass Valve Secondary Command Signal Message Counter Incorrect.
Common causes
Common causes include Wiring harness issues or electrical connection problems, Faulty engine coolant bypass valve, Malfunctioning engine control module (ECM).
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P10BF 2016 GMC Sierra Description

The P10BF diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Engine Coolant Bypass Valve Secondary Command Signal Message Counter being incorrect. This code indicates that there is a discrepancy in the signal communication related to the engine coolant bypass valve, which can have implications for the vehicle's cooling system and engine performance. The engine coolant bypass valve plays a crucial role in regulating the flow of coolant through the engine, helping to maintain optimal operating temperatures. When the signal message counter is incorrect, it means that the communication between the engine control module (ECM) and the bypass valve is compromised, leading to potential issues with coolant flow regulation.

OBDII Code P10BF 2016 GMC Sierra - Engine Coolant Bypass Valve Secondary Command Signal Message Counter Incorrect
P10BF 2016 GMC Sierra Code - Engine Coolant Bypass Valve Secondary Command Signal Message Counter Incorrect

Common Causes of P10BF 2016 GMC Sierra

  1. Wiring harness issues or electrical connection problems
  2. Faulty engine coolant bypass valve
  3. Malfunctioning engine control module (ECM)
  4. Sensor failures related to coolant temperature monitoring
  5. Corrosion or blockages in the coolant system

Symptoms of P10BF 2016 GMC Sierra

  1. Check engine light illuminated on the dashboard
  2. Engine overheating or not reaching optimal operating temperature
  3. Reduced engine performance or efficiency
  4. Coolant leaks or unusual coolant levels
  5. Inconsistent or erratic engine behavior

How to Fix P10BF 2016 GMC Sierra

  1. Begin by conducting a thorough diagnostic scan to confirm the P10BF code and identify the specific cause of the issue.
  2. Inspect the wiring harness, connectors, and electrical connections related to the engine coolant bypass valve for any signs of damage or corrosion. Repair or replace as needed.
  3. Test the engine coolant bypass valve for proper functionality and replace if it is found to be faulty.
  4. Check the engine control module (ECM) for any malfunctions or errors and reprogram or replace if necessary.
  5. Flush and refill the coolant system, ensuring proper coolant levels and system integrity.

Cost to Fix P10BF 2016 GMC Sierra

The cost estimate for repairing the P10BF code on a 2016 GMC Sierra can vary depending on the specific cause of the issue and the extent of repairs needed. On average, the cost of parts for this repair can range from $100 to $300, with labor costs typically adding an additional $100 to $200. Overall, a total repair cost for this issue may fall between $200 and $500. However, it's essential to note that labor rates and parts prices can vary based on location, vehicle make and model, and the repair shop's rates. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate for this repair.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P10BF 2016 GMC Sierra Code

1. What does the OBDII code P10BF mean on a 2016 GMC Sierra?

P10BF indicates an issue with the engine coolant bypass valve, specifically that the secondary command signal message counter is incorrect or not matching expected values.

2. What are the common symptoms of code P10BF on a 2016 GMC Sierra?

Symptoms may include an illuminated check engine light, engine overheating, poor cabin heating, or erratic coolant temperature readings.

3. What causes the P10BF code to appear on a 2016 GMC Sierra?

The code can be triggered by a faulty engine coolant bypass valve, wiring issues, a malfunctioning module, or corrupted communication signals between the valve and the powertrain control module (PCM).

4. Can you drive a 2016 GMC Sierra with a P10BF code?

Driving with this code is not recommended, as it may result in overheating, reduced engine efficiency, or potential damage to engine components if the coolant flow is not properly regulated.

5. How is the P10BF code diagnosed on a 2016 GMC Sierra?

A technician will typically use a scan tool to confirm the code, inspect the wiring and connectors for damage, test the coolant bypass valve for proper operation, and verify the communication signals between the valve and PCM.

6. What repairs are typically needed for a P10BF code?

Repairs may include replacing the engine coolant bypass valve, repairing damaged wiring or connectors, or reprogramming/updating the PCM if a software issue is identified.

7. How much does it cost to fix the P10BF code on a 2016 GMC Sierra?

The cost can vary but may range from $200 to $500, depending on whether the bypass valve, wiring, or PCM requires attention and labor rates in your area.

8. Can a faulty thermostat cause the P10BF code to appear?

While a faulty thermostat can cause cooling system issues, it is not directly related to the P10BF code, which specifically pertains to the coolant bypass valve's communication.

9. Will clearing the P10BF code fix the issue permanently?

Clearing the code will temporarily remove it, but unless the underlying issue is resolved, the code will likely return.

10. Is the engine coolant bypass valve covered under warranty for a 2016 GMC Sierra?

Warranty coverage depends on the vehicle's mileage, age, and specific warranty terms. Check with your dealership to confirm coverage for this part.

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