Engine-CodesGMC – P117A 2016 GMC Sierra

P117A 2016 GMC Sierra Code - Engine Block Coolant Valve Signal Message Counter Incorrect

Quick Answer

The P117A diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the Engine Block Coolant Valve Signal Message Counter is Incorrect. Common causes include Faulty engine block coolant valve, Wiring issues or electrical faults, Malfunctioning 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
P117A 2016 GMC Sierra indicates Engine Block Coolant Valve Signal Message Counter Incorrect.
Common causes
Common causes include Faulty engine block coolant valve, Wiring issues or electrical faults, Malfunctioning 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.
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P117A 2016 GMC Sierra Description

The P117A diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the Engine Block Coolant Valve Signal Message Counter is Incorrect. This code typically points to a problem with the engine block coolant valve, which is responsible for regulating the flow of coolant through the engine block to maintain optimal operating temperatures. The signal message counter being incorrect suggests that there is a discrepancy in the communication between the engine control module (ECM) and the coolant valve.

OBDII Code P117A 2016 GMC Sierra - Engine Block Coolant Valve Signal Message Counter Incorrect
P117A 2016 GMC Sierra Code - Engine Block Coolant Valve Signal Message Counter Incorrect

Common Causes of P117A 2016 GMC Sierra

  1. Faulty engine block coolant valve
  2. Wiring issues or electrical faults
  3. Malfunctioning ECM
  4. Communication error between components
  5. Coolant system blockage or restriction

Symptoms of P117A 2016 GMC Sierra

  1. Engine overheating
  2. Decreased fuel efficiency
  3. Loss of power
  4. Check Engine Light illuminated
  5. Engine running rough or stalling

How to Fix P117A 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the engine block coolant valve and associated wiring for any visible damage or corrosion.
  2. Test the coolant valve's operation using a multimeter to check for proper voltage and resistance.
  3. Verify the ECM's communication with the coolant valve by checking for any stored codes and performing a diagnostic scan.
  4. Replace the engine block coolant valve if it is found to be faulty, ensuring proper installation and calibration.
  5. Clear the DTC from the ECM's memory and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P117A 2016 GMC Sierra

The typical repair costs for addressing a P117A DTC on a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty engine block coolant valve can cost between $150 and $300, including parts and labor. Additional costs may apply if wiring repairs or ECM reprogramming are necessary. It is advisable to consult with a reputable auto repair shop for a more accurate estimate based on the vehicle's condition and location. Keep in mind that labor rates can vary, with hourly rates typically ranging from $80 to $150.

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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 2016 GMC Sierra Code

1. What does the OBDII code P117A mean on a 2016 GMC Sierra?

P117A indicates an issue with the Engine Block Coolant Valve Signal, specifically that the message counter from the valve is incorrect or outside expected parameters.

2. What are the common symptoms of code P117A on a 2016 GMC Sierra?

Symptoms may include an illuminated check engine light, engine overheating, reduced engine performance, or inconsistent cabin heating.

3. What causes the P117A code to appear on a 2016 GMC Sierra?

Common causes include a faulty engine block coolant valve, wiring or connector issues, a malfunctioning control module, or software-related problems.

4. Can I drive my 2016 GMC Sierra with a P117A code?

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

5. How do I diagnose a P117A code on my 2016 GMC Sierra?

Diagnosis involves inspecting the engine block coolant valve, checking for damaged wiring or connectors, and scanning the system for related codes or control module issues.

6. How do I fix the P117A code on a 2016 GMC Sierra?

Repairs may include replacing the engine block coolant valve, repairing damaged wiring or connectors, or reprogramming the control module if necessary.

7. How much does it cost to fix the P117A code on a 2016 GMC Sierra?

Repair costs can vary but typically range from $150 to $500, depending on whether the valve, wiring, or control module requires replacement or repair.

8. Can a faulty thermostat cause a P117A code on a 2016 GMC Sierra?

While unlikely, a faulty thermostat could contribute to overheating issues, but the code specifically points to the engine block coolant valve.

9. Does the P117A code require reprogramming the control module on a 2016 GMC Sierra?

In some cases, reprogramming or updating the control module software may be needed if a glitch or outdated firmware is causing the issue.

10. How can I prevent the P117A code from appearing again on my 2016 GMC Sierra?

Regular maintenance, inspecting the cooling system components, and addressing any wiring or connector issues early can help prevent recurrence of this code.

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