P117A 2018 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 2018 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.
Code P117A 2018 GMC Sierra Description
What are the Possible Causes of the DTC P117A 2018 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 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 P117A 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 P117A 2018 GMC Sierra code?
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Frequently Asked Questions about P117A 2018 GMC Sierra Code
1. What does the OBDII code P117A mean on a 2018 GMC Sierra?
P117A indicates that the Engine Block Coolant Valve Signal Message Counter is incorrect, which means the engine control module (ECM) is detecting an issue with the data communication or operation of the coolant valve.
2. What are the common symptoms of code P117A in a 2018 GMC Sierra?
Symptoms may include an illuminated check engine light, irregular engine temperature regulation, reduced fuel efficiency, or inconsistent cabin heating performance.
3. What causes the P117A code in a GMC Sierra?
Possible causes include a malfunctioning engine block coolant valve, wiring or connector issues, a communication error between the valve and the ECM, or a software issue in the ECM.
4. Can I drive my GMC Sierra with a P117A code?
Driving with this code is possible in the short term, but it is not advisable as improper coolant flow can lead to engine overheating or reduced efficiency.
5. How do I fix the P117A code on my GMC Sierra?
Repairs may include inspecting and repairing wiring or connectors, replacing a faulty engine block coolant valve, or reprogramming the ECM if necessary.
6. How can I diagnose the P117A code on my 2018 GMC Sierra?
Use an OBDII scanner to confirm the code, inspect the engine block coolant valve and its wiring, and check for any related codes or communication errors in the ECM.
7. Is the P117A code an expensive repair on a GMC Sierra?
The cost depends on the root cause. Replacing the coolant valve may cost a few hundred dollars, while wiring repairs or ECM reprogramming could vary in price.
8. Will clearing the P117A code fix the problem permanently?
Clearing the code will reset the warning temporarily, but the issue will return if the underlying cause is not resolved.
9. What tools are needed to troubleshoot the P117A code?
You’ll need a diagnostic OBDII scanner, a multimeter for testing wiring, and possibly a repair manual for your GMC Sierra to locate components.
10. Can a faulty thermostat cause the P117A code in a GMC Sierra?
No, the P117A code specifically relates to the engine block coolant valve and its communication with the ECM, not the thermostat.
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