AutoCodes – GMC – P103D 2016 GMC Sierra

P103D 2016 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 2016 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.

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Code Popularity 157

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 19, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P103D 2016 GMC Sierra Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Engine Coolant Pump Control Signal Message Counter is Incorrect.

OBDII Code P103D 2016 GMC Sierra - Engine Coolant Pump Control Signal Message Counter Incorrect - AutoCodes.com — P103D 2016 GMC Sierra Code - Engine Coolant Pump Control Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P103D 2016 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 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 P103D 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.

Need more information about the P103D 2016 GMC Sierra code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P103D 2016 GMC Sierra Code

What does OBDII code P103D mean on a 2016 GMC Sierra?

P103D indicates an issue with the Engine Coolant Pump Control Signal Message Counter, meaning the control module has detected incorrect data or a communication error with the coolant pump's signal.

What are the common symptoms of code P103D on a GMC Sierra?

Symptoms may include an illuminated check engine light, erratic engine cooling performance, overheating issues, or reduced engine efficiency.

What causes code P103D on a 2016 GMC Sierra?

Possible causes include a faulty engine coolant pump, wiring issues, poor connection in the pump control circuit, or a malfunctioning control module.

Can I drive my GMC Sierra with a P103D code?

It is not recommended to drive the vehicle with this code, as cooling system issues can lead to engine overheating and potential damage.

How do I diagnose code P103D on a GMC Sierra?

Diagnosis involves inspecting the coolant pump, checking the wiring and connectors for damage or corrosion, and verifying signal communication between the pump and control module.

How can I fix code P103D on my GMC Sierra?

Repairs may include replacing the engine coolant pump, fixing damaged wiring, cleaning connectors, or reprogramming or replacing the control module.

Is code P103D specific to GMC vehicles?

No, P103D can appear on other vehicles equipped with similar systems, but it is commonly reported on GMC models like the Sierra.

Will a faulty coolant pump always trigger code P103D?

Not necessarily; the code may also be triggered by electrical issues in the wiring or control module communication problems.

How much does it cost to fix code P103D on a GMC Sierra?

Repair costs can vary widely depending on the root cause, but replacing a coolant pump may cost $300â€“$700, while wiring or module repairs may differ.

How can I prevent code P103D from occurring?

Regular inspection of the coolant system, keeping electrical connections clean, and addressing cooling system issues promptly can help prevent this code.