P103E 2015 GMC Sierra Code - Auxiliary Coolant Pump Control Signal Message Counter Incorrect
Quick Answer
The P103E diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that there is an issue with the Auxiliary Coolant Pump Control Signal Message Counter being incorrect. Common causes include Faulty auxiliary coolant pump, Malfunctioning coolant temperature sensor, Wiring issues. 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, Malfunctioning coolant temperature sensor, Wiring issues.
- 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 P103E 2015 GMC Sierra Description
The P103E diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that there is an issue with the Auxiliary Coolant Pump Control Signal Message Counter being incorrect. In simpler terms, this means that the vehicle's computer system is not receiving the expected signal from the auxiliary coolant pump, which can lead to various issues related to the cooling system.
Common Causes of P103E 2015 GMC Sierra
- Faulty auxiliary coolant pump
- Malfunctioning coolant temperature sensor
- Wiring issues
- Computer system malfunction
- Low coolant levels
Symptoms of P103E 2015 GMC Sierra
- Engine overheating
- Reduced fuel efficiency
- Check engine light illuminated
- Poor engine performance
- Coolant leaks
How to Fix P103E 2015 GMC Sierra
- Begin by diagnosing the specific cause of the issue using a diagnostic scanner to retrieve the fault codes and pinpoint the exact problem.
- Inspect the auxiliary coolant pump for any signs of damage or malfunction and replace if necessary.
- Check the coolant temperature sensor for proper operation and replace if faulty.
- Inspect the wiring harness for any loose connections or damage and repair as needed.
- Clear the DTC codes and perform a test drive to ensure the issue has been resolved.
Cost to Fix P103E 2015 GMC Sierra
The cost of repairing a P103E code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost for parts such as an auxiliary coolant pump, coolant temperature sensor, or wiring harness can range from $100 to $300. Labor costs for diagnosis and repair typically range from $100 to $300, with total repair costs ranging from $200 to $600. It's important to note that labor rates and part prices can vary based on the location, shop rates, and the specific make and model of the vehicle. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate.
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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.
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