AutoCodes – Chevrolet – P103E 2018 Chevrolet Silverado

P103E 2018 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 2018 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 286

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 2018 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 2018 Chevrolet Silverado - Auxiliary Coolant Pump Control Signal Message Counter Incorrect - AutoCodes.com — P103E 2018 Chevrolet Silverado Code - Auxiliary Coolant Pump Control Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P103E 2018 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 2018 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 2018 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P103E 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2018 Chevrolet Silverado Code

1. What does the OBDII code P103E mean on a 2018 Chevrolet Silverado?

P103E indicates an issue with the Auxiliary Coolant Pump Control Signal Message Counter being incorrect, typically related to communication errors between the pump and the vehicle's control module.

2. What are the symptoms of code P103E in a 2018 Chevrolet Silverado?

Common symptoms include an illuminated check engine light, potential overheating in specific engine components, or reduced performance of the auxiliary cooling system.

3. What causes the P103E code to appear on a 2018 Chevrolet Silverado?

Possible causes include a faulty auxiliary coolant pump, wiring or connector issues, a malfunctioning control module, or software glitches.

4. Can I drive my 2018 Chevrolet Silverado with the P103E code?

Itâ€™s not recommended to drive for extended periods, as an impaired auxiliary coolant pump could lead to overheating or damage to engine components.

5. How do I diagnose the P103E code on my Silverado?

Start by inspecting the auxiliary coolant pump, checking for damaged wiring or loose connectors, and scanning for related codes to narrow down the issue.

6. How is the P103E code fixed on a 2018 Chevrolet Silverado?

Repairs may involve replacing the auxiliary coolant pump, repairing damaged wiring, updating the control module software, or clearing the code after resolving the issue.

7. Is the auxiliary coolant pump the same as the main coolant pump?

No, the auxiliary coolant pump is a secondary pump used to circulate coolant through specific components, typically for improved efficiency or temperature control.

8. Can a software update fix the P103E code on a 2018 Silverado?

Yes, in some cases, a software update to the vehicleâ€™s control module can resolve communication issues causing the P103E code.

9. How much does it cost to repair the P103E code on a Chevrolet Silverado?

Repair costs can range from $200 to $600, depending on whether the issue involves the pump, wiring, or control module.

10. What tools are needed to troubleshoot the P103E code?

Youâ€™ll need an OBDII scanner to read and clear codes, a multimeter to test wiring, and possibly a service manual for detailed troubleshooting steps.