AutoCodes – Chevrolet – P117A 2018 Chevrolet Silverado

P117A 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 290

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Engine Block Coolant Valve Signal Message Counter Incorrect - AutoCodes.com — P117A 2018 Chevrolet Silverado Code - Engine Block Coolant Valve Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P117A 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P117A 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Code

1. What does the OBDII code P117A mean on a 2018 Chevrolet Silverado?

P117A indicates an issue with the Engine Block Coolant Valve Signal Message Counter, meaning the engine control module (ECM) is receiving incorrect or unexpected data from the coolant valve.

2. What are the symptoms of code P117A on a Chevrolet Silverado?

Common symptoms include an illuminated check engine light, potential engine overheating, poor cabin heating performance, or erratic temperature gauge readings.

3. What causes the P117A code on a 2018 Chevrolet Silverado?

The code can be caused by a malfunctioning coolant valve, wiring or connector issues, a faulty ECM, or software-related communication errors.

4. Can I drive my Silverado with the P117A code?

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

5. How is the P117A code diagnosed?

A technician will inspect the wiring and connectors, test the coolant valve operation, and check for proper communication between the ECM and the valve using a diagnostic scanner.

6. How do you fix the P117A code on a Chevrolet Silverado?

Repairs may include replacing the engine block coolant valve, repairing damaged wiring or connectors, updating ECM software, or replacing the ECM if it's determined to be faulty.

7. Is the P117A code specific to the 2018 Chevrolet Silverado?

While P117A is more commonly reported in GM vehicles like the Silverado, it may appear in other vehicles with similar cooling system designs.

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

The cost can vary, but replacing the coolant valve typically ranges from $150 to $400, depending on parts and labor. Additional repairs like wiring fixes or ECM replacement may increase costs.

9. Can a dirty or clogged coolant system cause the P117A code?

While not a direct cause, debris or blockages in the cooling system can strain the coolant valve, potentially leading to related issues over time.

10. Will clearing the P117A code solve the problem?

Clearing the code without addressing the underlying issue will only temporarily hide the problem. The code is likely to return until the root cause is fixed.