AutoCodes – Chevrolet – P15C9 Chevrolet

P15C9 Chevrolet 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 Chevrolet 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 1,491

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

What does this mean?

What are the Possible Causes of the DTC P15C9 Chevrolet?

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 Chevrolet?

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

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 Chevrolet Code

1. What does the OBDII code P15C9 mean on a Chevrolet?

The P15C9 code indicates that the Electric A/C Compressor Status Message Counter is incorrect, meaning there is a communication error between the A/C compressor and the vehicle's control modules.

2. What are the common symptoms of the P15C9 code?

Symptoms may include reduced or no air conditioning performance, A/C compressor not engaging, or the illumination of the check engine light.

3. What causes the P15C9 code in a Chevrolet?

Common causes include faulty wiring or connectors, a malfunctioning electric A/C compressor, software issues in the control module, or a communication failure in the vehicle's network.

4. Can I still drive my car with the P15C9 code?

Yes, you can drive with this code, but the A/C system may not function properly, which can be uncomfortable in hot weather. It's best to address the issue promptly to restore full functionality.

5. How is the P15C9 code diagnosed?

A mechanic will use a scan tool to check for related codes, inspect the wiring and connectors to the A/C compressor, and test the compressor and control module for proper operation.

6. How do you fix the P15C9 code on a Chevrolet?

Repairs may involve fixing or replacing damaged wiring or connectors, reprogramming the control module, or replacing the electric A/C compressor if it is defective.

7. Could a software update fix the P15C9 code?

Yes, in some cases, a software update for the vehicle's control module may resolve communication issues causing the P15C9 code.

8. How much does it cost to repair the P15C9 code?

Repair costs can vary widely depending on the root cause. Simple wiring repairs may cost around $100-$200, while replacing the A/C compressor can cost upwards of $1,000.

9. What tools are needed to troubleshoot the P15C9 code?

Tools include an OBDII scan tool, a multimeter for checking electrical connections, and possibly a GM-specific diagnostic tool for advanced troubleshooting.

10. Can a low refrigerant level cause the P15C9 code?

While low refrigerant levels typically trigger different codes, they can indirectly affect the A/C system's performance. However, the P15C9 code specifically relates to communication issues, not refrigerant levels.