AutoCodes – Cadillac – P103E Cadillac

P103E Cadillac 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 Cadillac 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 463
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 19, 2022
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Code P103E Cadillac 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 Cadillac - Auxiliary Coolant Pump Control Signal Message Counter Incorrect - AutoCodes.com
P103E Cadillac Code - Auxiliary Coolant Pump Control Signal Message Counter Incorrect

What are the Possible Causes of the DTC P103E Cadillac?

  • 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 Cadillac?

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 Cadillac 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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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 Cadillac Code

1. What are the common symptoms of OBDII code P103E in a Cadillac related to the Auxiliary Coolant Pump?

- Common symptoms include overheating of the engine, reduced heating or cooling performance, and potential issues with the vehicle's climate control system.

2. What can cause the OBDII code P103E in a Cadillac?

- The code P103E may be triggered by a faulty auxiliary coolant pump, a malfunctioning control module, electrical wiring issues, or a communication error within the vehicle's network.

3. How can I diagnose the OBDII code P103E in my Cadillac?

- Diagnosing the code P103E typically involves using a professional OBDII scanner to retrieve the specific fault codes, inspecting the auxiliary coolant pump and related components, and checking for any loose or damaged wiring connections.

4. Is it safe to continue driving with the OBDII code P103E in my Cadillac?

- It is not recommended to drive with the code P103E active, as it can lead to potential engine overheating and other cooling system issues. It is best to address the problem promptly to avoid further damage.

5. Can I repair the OBDII code P103E in my Cadillac myself?

- While some DIY enthusiasts may attempt to replace the auxiliary coolant pump or check wiring connections, it is advisable to consult a professional mechanic or dealership for an accurate diagnosis and proper repair of the issue.

6. How much does it typically cost to fix the OBDII code P103E in a Cadillac?

- The cost of repairing the OBDII code P103E can vary depending on the exact cause of the issue, the needed parts, and the labor costs. It is recommended to obtain quotes from different repair shops or dealerships for the most accurate estimate.

7. Can resetting the OBDII code P103E in my Cadillac make it go away permanently?

- Resetting the code may temporarily clear the error from the system, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and fix the root cause of the problem to prevent future occurrences.

8. Will driving with the OBDII code P103E affect my Cadillac's fuel efficiency?

- Driving with the code P103E can potentially impact your Cadillac's fuel efficiency, as the engine may not operate optimally due to cooling system issues. Resolving the problem promptly can help restore normal fuel efficiency.

9. How long does it typically take to repair the OBDII code P103E in a Cadillac?

- The repair time for the OBDII code P103E can vary based on the specific cause of the issue and the availability of parts. In general, the repair process may take a few hours to a full day, depending on the complexity of the repair.

10. Are there any preventive maintenance tips to avoid triggering the OBDII code P103E in my Cadillac?

- To help prevent the OBDII code P103E from appearing, it is advisable to follow the manufacturer's recommended maintenance schedule, regularly inspect the cooling system components, and address any issues promptly to maintain the vehicle's optimal performance.

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