P103D 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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.
Code P103D 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC P103D 2018 Chevrolet Silverado?
- 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 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 P103D 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 P103D 2018 Chevrolet Silverado code?
Need more information on how to fix the P103D 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P103D 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P103D 2018 Chevrolet Silverado Code
1. What does the OBDII code P103D mean on a 2018 Chevrolet Silverado?
P103D indicates that the Engine Control Module (ECM) has detected an issue with the engine coolant pump control signal message counter, meaning the signal between the ECM and the coolant pump is not being communicated correctly.
2. What are the common symptoms of a P103D code?
Common symptoms include an illuminated Check Engine Light, reduced engine cooling efficiency, engine overheating, or unusual coolant pump operation.
3. What causes the P103D code to appear?
The P103D code can be caused by a faulty coolant pump, damaged wiring or connectors in the coolant pump control circuit, a malfunctioning ECM, or software issues.
4. How do I diagnose a P103D code on my Silverado?
Start by scanning for the code, inspecting the wiring and connectors for damage or corrosion, checking the coolant pump’s operation, and ensuring the ECM is functioning correctly.
5. Can I drive my Silverado with a P103D code?
It’s not recommended to drive with this code active, as it may cause engine overheating, potentially leading to severe engine damage.
6. How do I fix a P103D code on a 2018 Chevrolet Silverado?
Repairs could include replacing the engine coolant pump, fixing damaged wiring or connectors, reprogramming the ECM, or replacing the ECM if necessary.
7. Is the P103D code specific to Chevrolet Silverado trucks?
While the P103D code is commonly seen in Chevrolet Silverado models, it can apply to other GM vehicles that use similar engine systems.
8. How much does it cost to repair a P103D code?
Repair costs vary depending on the issue, but replacing the coolant pump typically costs $300–$800, while wiring or ECM repairs may cost more depending on labor and parts.
9. Can a low coolant level cause a P103D code?
No, a low coolant level typically triggers other codes or warnings, but it’s always a good idea to check and maintain proper coolant levels to avoid additional issues.
10. Does clearing the P103D code fix the problem?
Clearing the code will reset the Check Engine Light temporarily, but the issue will return unless the underlying problem is addressed.
Discuss the causes and fixes for P103D 2018 Chevrolet Silverado OBDII Code
Code P103D 2018 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
