P103E 2016 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 2016 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 2016 GMC Sierra Description
What are the Possible Causes of the DTC P103E 2016 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 2016 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 2016 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 2016 GMC Sierra Code
1. What does OBDII code P103E mean on a 2016 GMC Sierra?
P103E indicates an issue with the auxiliary coolant pump control signal, where the message counter is incorrect, suggesting a communication or electrical problem.
2. What are the common symptoms of code P103E in a 2016 GMC Sierra?
Symptoms may include a check engine light, reduced cooling system performance, engine overheating, or unusual noise from the auxiliary coolant pump.
3. What causes the P103E code in a GMC Sierra?
Common causes include a faulty auxiliary coolant pump, wiring or connector issues, a malfunctioning control module, or software-related communication errors.
4. Can I drive my 2016 GMC Sierra with a P103E code?
While the vehicle may still be drivable, ignoring this code could lead to engine overheating and potential damage, so it’s best to address the issue promptly.
5. How do I diagnose the P103E code on a 2016 GMC Sierra?
Diagnosis involves inspecting the auxiliary coolant pump and related wiring for damage, checking connectors for corrosion, and using a scan tool to monitor the control signal.
6. How do I fix the P103E code on my 2016 GMC Sierra?
Repairs may include replacing the auxiliary coolant pump, repairing damaged wiring or connectors, or reprogramming the control module if necessary.
7. Is the auxiliary coolant pump critical for engine performance?
Yes, the auxiliary coolant pump helps regulate engine temperature, especially during high-demand conditions, so it’s important for proper engine operation.
8. How much does it cost to fix the P103E code on a GMC Sierra?
Repair costs vary but may range from $150 to $500 or more depending on whether the issue involves the pump, wiring, or control module.
9. Can a software update resolve the P103E code on my 2016 GMC Sierra?
In some cases, a software update to the control module may resolve communication issues causing the P103E code.
10. How can I prevent the P103E code from returning?
Regular maintenance, inspecting the cooling system components, and addressing wiring issues promptly can help prevent the code from reoccurring.
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