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P103E 2014 Chevrolet Silverado Code - Auxiliary Coolant Pump Control Signal Message Counter Incorrect

Quick Answer

The P103E code indicates that the auxiliary coolant pump control signal message counter is incorrect in a 2014 Chevrolet Silverado. Common causes include Faulty auxiliary coolant pump that fails to operate correctly, Damaged or corroded wiring and connectors affecting the signal transmission, Software issues in the engine control module (ECM) that misinterpret the pump's status. 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 2014 Chevrolet Silverado indicates Auxiliary Coolant Pump Control Signal Message Counter Incorrect.
Common causes
Common causes include Faulty auxiliary coolant pump that fails to operate correctly, Damaged or corroded wiring and connectors affecting the signal transmission, Software issues in the engine control module (ECM) that misinterpret the pump's status.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 08, 2024
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Code P103E 2014 Chevrolet Silverado Description

The P103E code indicates that the auxiliary coolant pump control signal message counter is incorrect in a 2014 Chevrolet Silverado. This code is part of the vehicle's onboard diagnostics (OBD-II) system and is specifically related to the auxiliary coolant pump, which plays a crucial role in managing engine temperature and ensuring optimal performance. The auxiliary coolant pump is responsible for circulating coolant through the engine and the heater core, especially when the engine is cold or when additional cooling is required, such as during heavy load conditions or when the vehicle is idling.

OBDII Code P103E 2014 Chevrolet Silverado - Auxiliary Coolant Pump Control Signal Message Counter Incorrect
P103E 2014 Chevrolet Silverado Code - Auxiliary Coolant Pump Control Signal Message Counter Incorrect

Common Causes of P103E 2014 Chevrolet Silverado

  1. Faulty auxiliary coolant pump that fails to operate correctly.
  2. Damaged or corroded wiring and connectors affecting the signal transmission.
  3. Software issues in the engine control module (ECM) that misinterpret the pump's status.
  4. A blown fuse related to the auxiliary coolant pump circuit.
  5. Poor ground connections that disrupt the electrical signal to the pump.

Symptoms of P103E 2014 Chevrolet Silverado

  1. Engine overheating, especially during heavy load or idling conditions.
  2. Poor heater performance, with insufficient heat output in the cabin.
  3. Check Engine Light (CEL) illuminated on the dashboard.
  4. Reduced fuel efficiency due to the engine running inefficiently.
  5. Unusual noises from the engine compartment, indicating pump or electrical issues.

How to Fix P103E 2014 Chevrolet Silverado

  1. Diagnostic Scan: Start by using an OBD-II scanner to confirm the P103E code and check for any additional codes that may provide further insight into the issue.
  2. Visual Inspection: Conduct a thorough visual inspection of the auxiliary coolant pump, wiring, and connectors for any signs of damage, corrosion, or loose connections.
  3. Electrical Testing: Use a multimeter to test the voltage and ground at the pump connector to ensure proper electrical supply. Check for continuity in the wiring harness.
  4. Pump Replacement: If the auxiliary coolant pump is found to be faulty, replace it with a new or refurbished unit, ensuring all connections are secure and properly sealed.
  5. ECM Reprogramming: If software issues are suspected, reprogram or update the ECM to ensure it communicates correctly with the auxiliary coolant pump.

Cost to Fix P103E 2014 Chevrolet Silverado

The typical repair costs for addressing the P103E code can vary widely based on the specific diagnosis and repair needed. Generally, the cost for parts, such as an auxiliary coolant pump, can range from $100 to $300, while labor costs can range from $80 to $150 per hour. The total repair cost may fall between $200 and $600, depending on the complexity of the repairs and the labor rates in your area. It's essential to note that labor rates can differ significantly based on location, vehicle make and model, and engine type. In metropolitan areas or at dealerships, rates may be higher, while independent shops often offer more competitive pricing. For a precise estimate, it's advisable to consult local repair shops.

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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 2014 Chevrolet Silverado Code

1. What does the OBDII code P103E mean on a 2014 Chevrolet Silverado?

The P103E code indicates an issue with the auxiliary coolant pump control signal, specifically that the message counter is incorrect or out of expected range.

2. What are the common symptoms of the P103E code?

Symptoms may include an illuminated check engine light, reduced engine cooling performance, or overheating in extreme cases.

3. What causes the P103E code to appear?

The code can be triggered by a faulty auxiliary coolant pump, damaged wiring, poor electrical connections, or a malfunction in the engine control module (ECM).

4. Can I drive my 2014 Chevrolet Silverado with the P103E code?

Driving with this code is not recommended, as it may lead to engine overheating or further damage if the auxiliary cooling system is not functioning correctly.

5. How do I diagnose the P103E code?

Start by scanning for additional codes, inspecting the auxiliary coolant pump wiring and connectors for damage, and testing the pump for proper operation.

6. How can I fix the P103E code on my Silverado?

Repairs may include replacing the auxiliary coolant pump, repairing damaged wiring, or reprogramming or replacing the ECM if necessary.

7. Is the P103E code related to the main coolant system?

Yes, the auxiliary coolant pump is part of the cooling system, designed to manage coolant flow, typically in turbocharged or high-performance setups.

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

You’ll need a diagnostic scanner, a multimeter, and potentially a wiring diagram for the auxiliary coolant pump system.

9. How much does it cost to repair the P103E code?

Repair costs can vary, but replacing the auxiliary coolant pump typically ranges from $200 to $500, depending on parts and labor.

10. Can a software issue cause the P103E code?

Yes, a software glitch in the ECM or BCM (Body Control Module) could potentially cause the code and may require a software update or reprogramming.

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