P117A 2018 GMC Sierra Code - Engine Block Coolant Valve Signal Message Counter Incorrect
Quick Answer
The diagnostic trouble code P117A for a 2018 GMC Sierra indicates that there is an issue with the Engine Block Coolant Valve Signal Message Counter being 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 2018 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.
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Code P117A 2018 GMC Sierra Description
The diagnostic trouble code P117A for a 2018 GMC Sierra indicates that there is an issue with the Engine Block Coolant Valve Signal Message Counter being 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.
Common Causes of P117A 2018 GMC Sierra
- Faulty engine block coolant valve
- Wiring or connection issues between the ECM and coolant valve
- ECM software malfunction
- Coolant system blockage or restriction
- Low coolant level
Symptoms of P117A 2018 GMC Sierra
- Engine overheating
- Poor engine performance
- Decreased fuel efficiency
- Check Engine Light illuminated
- Rough idling or stalling
How to Fix P117A 2018 GMC Sierra
- Diagnose the issue by using a scan tool to retrieve the trouble code and inspecting the engine block coolant valve and related components.
- Check the wiring and connections between the ECM and coolant valve for any damage or corrosion. Repair or replace as needed.
- Test the engine block coolant valve for proper operation and replace if it is found to be faulty.
- Flush the coolant system to ensure there are no blockages or restrictions that could be affecting coolant flow.
- Clear the trouble code from the ECM's memory and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix P117A 2018 GMC Sierra
The typical repair costs for addressing a P117A code on a 2018 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 to $300, while diagnosing and repairing wiring or connection issues may range from $100 to $200. Flushing the coolant system can add an additional $100 to $150 to the total repair cost. Overall, the total repair bill for this issue could range from $350 to $650, including parts and labor. It's important to note that labor rates at auto repair shops can vary, so it's recommended to check with local shops for a more accurate estimate.
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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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