AutoCodes – GMC – P0CE9 GMC

P0CE9 GMC Code - Hybrid/EV Electronics Coolant Pump Control Circuit

Quick Answer

The hybrid/EV electronics coolant pump circulates coolant through the power electronics coolant radiator, hybrid/EV powertrain control module 1 and the battery charger to control the temperature of the hybrid/EV powertrain control module 1 and the battery charger. Common causes include Faulty Hybrid/EV Electronics Coolant Pump, Hybrid/EV Electronics Coolant Pump harness is open or shorted, Hybrid/EV Electronics Coolant Pump 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
P0CE9 GMC indicates Hybrid/EV Electronics Coolant Pump Control Circuit.
Common causes
Common causes include Faulty Hybrid/EV Electronics Coolant Pump, Hybrid/EV Electronics Coolant Pump harness is open or shorted, Hybrid/EV Electronics Coolant Pump 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 917
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 26, 2020
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Code P0CE9 GMC Description

The hybrid/EV electronics coolant pump circulates coolant through the power electronics coolant radiator, hybrid/EV powertrain control module 1 and the battery charger to control the temperature of the hybrid/EV powertrain control module 1 and the battery charger. An enable signal from the hybrid/EV powertrain control module 2 to the hybrid/EV electronics coolant pump provides overall control of the pump. When this circuit is high, the pump can operate. The pump is controlled with a pulse-width modulated signal from the hybrid/EV powertrain control module 2 to the hybrid/EV electronics coolant pump. The higher the duty cycle the higher the pump speed. The hybrid/EV electronics coolant pump provides a hard-wired pulse-width modulated feedback signal to the hybrid/EV powertrain control module 2. During normal operation, this feedback signal provides pump speed information. The hybrid/EV electronics coolant pump has some self-diagnostic capability. If it determines there is an internal fault it provides this information on this same feedback circuit instead of pump speed information.
OBDII Code P0CE9 GMC - Hybrid/EV Electronics Coolant Pump Control Circuit - AutoCodes.com
P0CE9 GMC Code - Hybrid/EV Electronics Coolant Pump Control Circuit

What are the Possible Causes of the DTC P0CE9 GMC?

  • Faulty Hybrid/EV Electronics Coolant Pump
  • Hybrid/EV Electronics Coolant Pump harness is open or shorted
  • Hybrid/EV Electronics Coolant Pump circuit poor electrical connection

How to Fix the DTC P0CE9 GMC?

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 P0CE9 GMC 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 P0CE9 GMC 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 P0CE9 GMC Code

1. What are the common symptoms of OBDII code P0CE9 in a GMC Hybrid/EV vehicle?

- Common symptoms include overheating, reduced engine performance, and illuminated check engine light.

2. What does the Hybrid/EV Electronics Coolant Pump Control Circuit do in a GMC vehicle?

- The circuit controls the operation of the coolant pump to maintain proper temperature for the hybrid or electric vehicle components.

3. What are the possible causes of OBDII code P0CE9 in a GMC Hybrid/EV vehicle?

- The code can be triggered by a faulty coolant pump, damaged wiring or connectors, low coolant level, or a malfunctioning control module.

4. How can I diagnose the Hybrid/EV Electronics Coolant Pump Control Circuit issue in my GMC vehicle?

- A thorough inspection of the coolant pump, wiring, connectors, and coolant level, along with using a scan tool to retrieve and analyze the fault codes, is recommended.

5. Can I continue driving my GMC Hybrid/EV vehicle with OBDII code P0CE9?

- It is not recommended to drive the vehicle with this code active, as it can lead to engine overheating and potential damage to the hybrid or electric components.

6. Is it possible to repair the Hybrid/EV Electronics Coolant Pump Control Circuit issue myself?

- While some basic troubleshooting like checking for loose connections or topping up coolant can be done by DIY enthusiasts, complex repairs may require professional assistance.

7. How much does it typically cost to repair OBDII code P0CE9 in a GMC Hybrid/EV vehicle?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a faulty coolant pump cause other problems in a GMC Hybrid/EV vehicle?

- Yes, a faulty coolant pump can lead to engine overheating, reduced fuel efficiency, and potential damage to other hybrid or electric components.

9. Are there any preventive maintenance tips to avoid OBDII code P0CE9 in a GMC Hybrid/EV vehicle?

- Regularly monitoring coolant levels, performing cooling system inspections, and addressing any cooling system issues promptly can help prevent this code from appearing.

10. How long does it take to repair the Hybrid/EV Electronics Coolant Pump Control Circuit issue in a GMC vehicle?

- The repair time can vary based on the extent of the issue and availability of parts, but it typically takes a few hours to a full day to complete the repair.

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