AutoCodes – Chevrolet – P103E 2016 Chevrolet Silverado

P103E 2016 Chevrolet Silverado 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 Chevrolet Silverado 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.

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Code Popularity 490

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P103E 2016 Chevrolet Silverado 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 Auxiliary Coolant Pump Control Signal Message Counter is Incorrect.

OBDII Code P103E 2016 Chevrolet Silverado - Auxiliary Coolant Pump Control Signal Message Counter Incorrect - AutoCodes.com — P103E 2016 Chevrolet Silverado Code - Auxiliary Coolant Pump Control Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P103E 2016 Chevrolet Silverado?

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 Chevrolet Silverado?

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 Chevrolet Silverado 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 P103E 2016 Chevrolet Silverado 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 P103E 2016 Chevrolet Silverado Code

1. What does the OBDII code P103E mean on a 2016 Chevrolet Silverado?

P103E indicates an issue with the auxiliary coolant pump control signal, specifically that the message counter is incorrect or not functioning as expected.

2. What are the common symptoms of code P103E in a 2016 Chevrolet Silverado?

Symptoms may include an illuminated check engine light, reduced engine cooling performance, or overheating during heavy loads or towing.

3. What causes code P103E in a 2016 Chevrolet Silverado?

Common causes include a faulty auxiliary coolant pump, damaged wiring or connectors in the pump circuit, or a malfunction in the engine control module (ECM).

4. Can I drive my Silverado with a P103E code?

While the vehicle may still be drivable, ignoring this code can lead to overheating issues, potentially causing engine damage. It's best to address the problem promptly.

5. How is code P103E diagnosed on a 2016 Chevrolet Silverado?

A technician will inspect the auxiliary coolant pump, check the wiring and connectors for damage, and use a scan tool to monitor the control signal and message counter data.

6. How do you fix code P103E on a 2016 Chevrolet Silverado?

Repairs may involve replacing the auxiliary coolant pump, repairing damaged wiring or connectors, or updating/reprogramming the engine control module (ECM).

7. What tools are needed to diagnose and fix code P103E?

A diagnostic scan tool, a multimeter for checking electrical circuits, and possibly a wiring diagram for the auxiliary coolant pump system are essential tools.

8. Does code P103E always mean the auxiliary coolant pump is bad?

No, the issue could also stem from wiring faults, connector issues, or ECM malfunctions, so proper diagnosis is necessary before replacing parts.

9. How much does it cost to fix a P103E code on a 2016 Chevrolet Silverado?

Repair costs can vary but typically range from $150 to $500, depending on whether the pump, wiring, or ECM requires repair or replacement.

10. Can a software update fix the P103E code on a Silverado?

In some cases, a software update for the ECM may resolve the issue if the problem is related to incorrect signal processing or message counter errors.