AutoCodes – GMC – P117A 2017 GMC Sierra

P117A 2017 GMC Sierra Code - Engine Block Coolant Valve 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 Block Coolant Valve, Engine Block Coolant Valve harness is open or shorted, Engine Block Coolant 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: P117A 2017 GMC Sierra indicates Engine Block Coolant Valve Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Engine Block Coolant Valve, Engine Block Coolant Valve harness is open or shorted, Engine Block Coolant 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 167

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 P117A 2017 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 Block Coolant Valve Signal Message Counter is Incorrect.

OBDII Code P117A 2017 GMC Sierra - Engine Block Coolant Valve Signal Message Counter Incorrect - AutoCodes.com — P117A 2017 GMC Sierra Code - Engine Block Coolant Valve Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P117A 2017 GMC Sierra?

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

How to Fix the DTC P117A 2017 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 P117A 2017 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 P117A 2017 GMC Sierra code?

Need more information on how to fix the P117A 2017 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 P117A 2017 GMC Sierra Code

1. What does the OBDII code P117A mean on a 2017 GMC Sierra?

P117A indicates that the Engine Control Module (ECM) has detected an issue with the Engine Block Coolant Valve Signal Message Counter, which suggests a communication or functionality problem with the coolant valve.

2. What are the common symptoms of a P117A code in a GMC Sierra?

Symptoms may include an illuminated check engine light, engine overheating, reduced engine performance, or poor cabin heater performance.

3. What causes the P117A code to appear?

Common causes include a faulty engine block coolant valve, wiring or connector issues, software glitches in the ECM, or a failure in the communication between the valve and the ECM.

4. Is a P117A code serious?

While it may not immediately affect drivability, ignoring the issue could lead to engine overheating or damage if the coolant flow is not properly regulated.

5. How do I diagnose a P117A code on my 2017 GMC Sierra?

Start by checking the wiring and connectors to the engine block coolant valve for damage or corrosion. Use a scan tool to monitor communication signals and inspect the valve's operation.

6. Can I drive my GMC Sierra with a P117A code?

Itâ€™s possible to drive short distances, but itâ€™s not recommended as the engine cooling system may not function correctly, potentially leading to overheating or other damage.

7. How do I fix a P117A code on a 2017 GMC Sierra?

Repairs may involve replacing the engine block coolant valve, repairing damaged wiring or connectors, or updating the ECM software if a known issue exists.

8. How much does it cost to fix a P117A code?

The repair cost can vary, but replacing the engine block coolant valve typically costs between $150 and $400, including parts and labor. Diagnosing and addressing wiring or ECM issues could increase the cost.

9. Can a software update fix the P117A code?

Yes, if the issue is related to a known ECM software glitch, a dealership may resolve the problem with an update. Check for any related Technical Service Bulletins (TSBs).

10. Does a P117A code require professional repair?

While experienced DIYers can inspect wiring and connectors, diagnosing and repairing valve or ECM issues often requires specialized tools and knowledge, so professional assistance is recommended.