P103E 2015 GMC Sierra Code - Auxiliary 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 Auxiliary Coolant Pump Control Module, Auxiliary Coolant Pump Control Module harness is open or shorted, Auxiliary 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
- P103E 2015 GMC Sierra indicates Auxiliary Coolant Pump Control Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Auxiliary Coolant Pump Control Module, Auxiliary Coolant Pump Control Module harness is open or shorted, Auxiliary 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 P103E 2015 GMC Sierra Description
What are the Possible Causes of the DTC P103E 2015 GMC Sierra?
- Faulty Auxiliary Coolant Pump Control Module
- Auxiliary Coolant Pump Control Module harness is open or shorted
- Auxiliary Coolant Pump Control Module circuit poor electrical connection
How to Fix the DTC P103E 2015 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 P103E 2015 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 P103E 2015 GMC Sierra Code
What does the OBDII code P103E mean on a 2015 GMC Sierra?
The P103E code indicates that the Auxiliary Coolant Pump Control Signal Message Counter is incorrect, meaning there’s an issue with the communication or operation of the auxiliary coolant pump.
What are common symptoms of the P103E code on a 2015 GMC Sierra?
Symptoms may include the check engine light turning on, reduced coolant flow to critical components, engine overheating, or poor performance of features like turbocharger cooling.
What causes the P103E code to appear?
Common causes include a faulty auxiliary coolant pump, wiring or connector issues, a malfunctioning control module, or corrupted communication signals within the vehicle’s CAN (Controller Area Network).
Can I drive my 2015 GMC Sierra with the P103E code?
It’s not recommended to drive for extended periods with this code, as it might lead to overheating or damage to engine components relying on proper cooling.
How do I diagnose the P103E code?
Diagnosis involves scanning for OBDII codes, inspecting the auxiliary coolant pump and its wiring, checking the control module for faults, and testing the communication signals between components.
How do I fix the P103E code on my 2015 GMC Sierra?
Repairs may include replacing the auxiliary coolant pump, repairing damaged wiring or connectors, updating or reprogramming the control module, or clearing debris from the cooling system.
Can a bad thermostat trigger the P103E code?
While a bad thermostat can cause cooling issues, it’s not typically related to this code, which focuses on the auxiliary coolant pump and its control signal.
Does the P103E code require reprogramming the ECU?
In some cases, reprogramming the ECU or control module may be necessary if the issue stems from corrupted software or communication errors.
How much does it cost to repair the P103E code?
Repair costs vary depending on the cause, but replacing an auxiliary coolant pump can range from $300 to $600, including parts and labor, while wiring repairs or reprogramming may cost less.
Can a low coolant level cause the P103E code?
Low coolant levels might indirectly contribute to cooling system issues but are not the direct cause of this code, which relates to the pump’s control signal.
Discuss the causes and fixes for P103E 2015 GMC Sierra OBDII Code
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