P103D 2018 GMC Sierra Code - Engine Coolant Pump Control 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 Coolant Pump Control Module, Engine Coolant Pump Control Module harness is open or shorted, Engine Coolant Pump Control Module 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
- P103D 2018 GMC Sierra indicates Engine Coolant Pump Control Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Engine Coolant Pump Control Module, Engine Coolant Pump Control Module harness is open or shorted, Engine Coolant Pump Control Module 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 P103D 2018 GMC Sierra Description
What are the Possible Causes of the DTC P103D 2018 GMC Sierra?
- Faulty Engine Coolant Pump Control Module
- Engine Coolant Pump Control Module harness is open or shorted
- Engine Coolant Pump Control Module circuit poor electrical connection
How to Fix the DTC P103D 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 P103D 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.
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Frequently Asked Questions about P103D 2018 GMC Sierra Code
What does the OBDII code P103D mean on a 2018 GMC Sierra?
P103D indicates an issue with the engine coolant pump control signal message counter, suggesting the control module is not receiving proper communication from the coolant pump.
What are the common symptoms of a P103D code in a GMC Sierra?
Common symptoms include engine overheating, reduced fuel efficiency, poor cabin heating, and the Check Engine Light turning on.
What causes the P103D code to appear on a 2018 GMC Sierra?
This code is often caused by a faulty coolant pump, wiring issues, a failed control module, or software-related errors in the vehicle's communication system.
Can I drive my 2018 GMC Sierra with a P103D code?
It is not recommended to drive for extended periods with this code, as it may lead to engine overheating and potential long-term damage.
How is the P103D code diagnosed?
A technician will use a scan tool to verify the code, inspect the wiring and connections to the coolant pump, and test the operation of the pump and control module.
What repairs are typically needed to fix a P103D code?
Repairs may include replacing the coolant pump, repairing damaged wiring or connectors, or reprogramming the control module.
Is the P103D code related to the engine cooling system?
Yes, this code is directly related to the engine cooling system, specifically the electronic communication between the control module and the coolant pump.
Can a software update fix the P103D code on a GMC Sierra?
In some cases, a software update or reprogramming of the control module may resolve the issue if it is caused by a communication error.
How much does it cost to fix a P103D code on a 2018 GMC Sierra?
The cost can vary depending on the diagnosis, but replacing a coolant pump typically ranges from $300 to $800, including parts and labor.
Will clearing the P103D code with a scan tool fix the problem?
Clearing the code may temporarily turn off the Check Engine Light, but the underlying issue must be resolved to prevent the code from returning.
Discuss the causes and fixes for P103D 2018 GMC Sierra OBDII Code
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