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P117A 2017 GMC Sierra Code - Engine Block Coolant Valve Signal Message Counter Incorrect

Quick Answer

The diagnostic trouble code P117A for a 2017 GMC Sierra indicates that the Engine Block Coolant Valve Signal Message Counter is incorrect. Common causes include Faulty engine block coolant valve, Wiring or connection issues between the ECM and coolant valve, ECM software malfunction. 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, Wiring or connection issues between the ECM and coolant valve, ECM software malfunction.
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 16, 2024
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Code P117A 2017 GMC Sierra Description

The diagnostic trouble code P117A for a 2017 GMC Sierra indicates that the Engine Block Coolant Valve Signal Message Counter is incorrect. This code typically signifies a communication error between the engine control module (ECM) and the engine block coolant valve. The engine block coolant valve is responsible for regulating the flow of coolant to the engine block to maintain optimal operating temperature. When the ECM detects that the signal message counter from the engine block coolant valve is incorrect, it can lead to issues with engine cooling and performance.

OBDII Code P117A 2017 GMC Sierra - Engine Block Coolant Valve Signal Message Counter Incorrect
P117A 2017 GMC Sierra Code - Engine Block Coolant Valve Signal Message Counter Incorrect

Common Causes of P117A 2017 GMC Sierra

  1. Faulty engine block coolant valve
  2. Wiring or connection issues between the ECM and coolant valve
  3. ECM software malfunction
  4. Low coolant levels
  5. Coolant leaks

Symptoms of P117A 2017 GMC Sierra

  1. Engine overheating
  2. Reduced engine performance
  3. Poor fuel efficiency
  4. Illuminated check engine light
  5. Rough idling or stalling

How to Fix P117A 2017 GMC Sierra

  1. Begin by conducting a visual inspection of the coolant valve, wiring, and connections for any visible damage or corrosion.
  2. Use a diagnostic scanner to retrieve and clear the trouble code from the ECM memory.
  3. Test the engine block coolant valve for proper operation and signal communication.
  4. Check coolant levels and inspect for any leaks in the cooling system.
  5. If necessary, replace the faulty engine block coolant valve, repair any wiring issues, and reprogram the ECM as needed.

Cost to Fix P117A 2017 GMC Sierra

The cost of repairing the P117A code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Typically, replacing the engine block coolant valve can range from $150 to $300, while addressing wiring or connection issues may add to the total cost. Including parts and labor, the total repair cost could range from $200 to $500. It is recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on your vehicle's specific needs and location. Keep in mind that diagnostic time and labor rates can vary, so it's advisable to inquire about these factors before proceeding with the 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 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?

It’s possible to drive short distances, but it’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.

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