AutoCodes – GMC – P10BF 2018 GMC Sierra

P10BF 2018 GMC Sierra Code - Engine Coolant Bypass Valve Secondary Command Signal Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Engine Coolant Bypass Valve, Engine Coolant Bypass Valve harness is open or shorted, Engine Coolant Bypass Valve 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: P10BF 2018 GMC Sierra indicates Engine Coolant Bypass Valve Secondary Command Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Engine Coolant Bypass Valve, Engine Coolant Bypass Valve harness is open or shorted, Engine Coolant Bypass Valve 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.

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Code Popularity 254

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 26, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P10BF 2018 GMC Sierra Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Engine Coolant Bypass Valve Secondary Command Signal Message Counter is Incorrect.

OBDII Code P10BF 2018 GMC Sierra - Engine Coolant Bypass Valve Secondary Command Signal Message Counter Incorrect - AutoCodes.com — P10BF 2018 GMC Sierra Code - Engine Coolant Bypass Valve Secondary Command Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P10BF 2018 GMC Sierra?

Faulty Engine Coolant Bypass Valve
Engine Coolant Bypass Valve harness is open or shorted
Engine Coolant Bypass Valve circuit poor electrical connection

How to Fix the DTC P10BF 2018 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 P10BF 2018 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.

Need more information about the P10BF 2018 GMC Sierra code?

Need more information on how to fix the P10BF 2018 GMC Sierra code? Get Access to Factory Service Manuals

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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 2018 GMC Sierra Code

1. What does the OBDII code P10BF mean on a 2018 GMC Sierra?

P10BF indicates an issue with the Engine Coolant Bypass Valve Secondary Command Signal, where the message counter is incorrect, which may affect proper coolant flow.

2. What are common symptoms of the P10BF code on a 2018 GMC Sierra?

Symptoms may include engine overheating, reduced fuel efficiency, poor heater performance, or the check engine light being illuminated.

3. What causes the P10BF code to appear on a 2018 GMC Sierra?

The code can be caused by a faulty engine coolant bypass valve, wiring or connector issues, a software glitch in the engine control module (ECM), or sensor communication errors.

4. Can you drive with a P10BF code on a 2018 GMC Sierra?

Driving with this code is not recommended, as it could lead to engine overheating or reduced performance, potentially causing further damage.

5. How do you diagnose the P10BF code on a 2018 GMC Sierra?

Diagnosis involves using a scan tool to read live data, inspecting the coolant bypass valve and related wiring, and checking for proper signal communication between the ECM and the valve.

6. What repairs can fix the P10BF code on a 2018 GMC Sierra?

Repairs may include replacing the coolant bypass valve, repairing or replacing damaged wiring or connectors, or updating the ECM software.

7. How much does it cost to fix the P10BF code on a 2018 GMC Sierra?

Repair costs can vary, ranging from $100 to $500 or more, depending on whether the issue is with the valve, wiring, or ECM.

8. Can a faulty thermostat cause the P10BF code on a 2018 GMC Sierra?

While a faulty thermostat is not a direct cause, it can contribute to cooling system issues that may exacerbate related problems.

9. Does the P10BF code affect engine performance on a 2018 GMC Sierra?

Yes, this code can lead to engine overheating or suboptimal performance if the coolant flow is improperly regulated.

10. How can you prevent the P10BF code from recurring on a 2018 GMC Sierra?

Regular maintenance of the cooling system, inspecting wiring and connectors for damage, and timely software updates can help prevent this code from appearing again.