AutoCodes – Generic – P15C9

P15C9 Code - Electric A/C Compressor Status Message Counter Incorrect

Quick Answer

The hybrid powertrain control module 2 receives serial data messages from the A/C compressor. Common causes include Faulty Electric A/C Compressor, Electric A/C Compressor harness is open or shorted, Electric A/C Compressor 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: P15C9 indicates Electric A/C Compressor Status Message Counter Incorrect.
Common causes: Common causes include Faulty Electric A/C Compressor, Electric A/C Compressor harness is open or shorted, Electric A/C Compressor 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 13,420

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P15C9 Description

The hybrid powertrain control module 2 receives serial data messages from the A/C compressor. If the message counter from the A/C compressor is not incrementing based on the currently commanded state, the hybrid powertrain control module 2 sets the DTC.

OBDII Code P15C9 - Electric A/C Compressor Status Message Counter Incorrect - AutoCodes.com — P15C9 Code - Electric A/C Compressor Status Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P15C9?

Faulty Electric A/C Compressor
Electric A/C Compressor harness is open or shorted
Electric A/C Compressor circuit poor electrical connection

How to Fix the DTC P15C9?

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 P15C9 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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Need Help with the Code?

Get the P15C9 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P15C9 Buick — Electric A/C Compressor Status Message Counter Incorrect
P15C9 Cadillac — Electric A/C Compressor Status Message Counter Incorrect
P15C9 Chevrolet — Electric A/C Compressor Status Message Counter Incorrect
P15C9 GMC — Electric A/C Compressor Status Message Counter Incorrect

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 P15C9 Code

1. What are the common symptoms of OBDII code P15C9?

- Common symptoms include the air conditioning system not working properly, irregular cooling performance, and the AC compressor not engaging.

2. What can cause the OBDII code P15C9 to trigger?

- This code can be triggered by a faulty electric A/C compressor, damaged wiring or connectors, or a communication error within the A/C system.

3. How can I diagnose the OBDII code P15C9?

- Diagnosing this code typically involves checking the electric A/C compressor for proper operation, inspecting related wiring for damage, and using a diagnostic scanner to read the code and associated data.

4. Can a DIYer repair the OBDII code P15C9 at home?

- Repairing this code may require specialized tools and knowledge, so it is recommended to consult with a professional mechanic or auto technician for proper diagnosis and repair.

5. Is it safe to continue driving with the OBDII code P15C9 unresolved?

- It is not recommended to drive with this code unresolved, as it can lead to further damage to the A/C system and affect the comfort of the vehicle occupants.

6. How much does it typically cost to repair the OBDII code P15C9?

- The cost of repairing this code can vary depending on the root cause of the issue, but it may involve replacing the electric A/C compressor, repairing wiring, or addressing communication errors within the system.

7. Are there any preventive maintenance tips to avoid the OBDII code P15C9?

- Regular inspection of the A/C system, checking for proper operation, and addressing any issues promptly can help prevent the occurrence of this code.

8. Can a low refrigerant level cause the OBDII code P15C9 to trigger?

- While a low refrigerant level can affect the performance of the A/C system, it is not a common cause for the P15C9 code. It is important to address any refrigerant leaks or issues separately.

9. Will resetting the OBDII code P15C9 make it go away permanently?

- Resetting the code without addressing the underlying issue will not make it go away permanently. It is important to diagnose and repair the root cause of the code for a lasting solution.

10. How long does it typically take to repair the OBDII code P15C9?

- The repair time for this code can vary depending on the extent of the issue and the availability of parts. It is best to consult with a professional for an accurate estimate of the repair time.