AutoCodes – Cadillac – P15BA Cadillac

P15BA Cadillac Code - Electric A/C Compressor Control Module Ignition On/Start Switch Circuit High Voltage

Quick Answer

The Body Control Module (BCM) controls the ignition run relay through the control circuit by applying voltage to the circuit. Common causes include Faulty Hybrid Powertrain Control Module 2, Hybrid Powertrain Control Module 2 harness is open or shorted, Hybrid Powertrain Control Module 2 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: P15BA Cadillac indicates Electric A/C Compressor Control Module Ignition On/Start Switch Circuit High Voltage.
Common causes: Common causes include Faulty Hybrid Powertrain Control Module 2, Hybrid Powertrain Control Module 2 harness is open or shorted, Hybrid Powertrain Control Module 2 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 833

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 P15BA Cadillac Description

The Body Control Module (BCM) controls the ignition run relay through the control circuit by applying voltage to the circuit. The ignition circuit is energized when the vehicle power mode is Vehicle ON or Vehicle in Service Mode. The hybrid powertrain control module 2 sends the vehicle power mode status in a serial data message to the battery charger control module, A/C compressor, battery energy control module, fuel pump control module and the Transmission Control Module (TCM).

OBDII Code P15BA Cadillac - Electric A/C Compressor Control Module Ignition On/Start Switch Circuit High Voltage - AutoCodes.com — P15BA Cadillac Code - Electric A/C Compressor Control Module Ignition On/Start Switch Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P15BA Cadillac?

Faulty Hybrid Powertrain Control Module 2
Hybrid Powertrain Control Module 2 harness is open or shorted
Hybrid Powertrain Control Module 2 circuit poor electrical connection

How to Fix the DTC P15BA 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 P15BA 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 P15BA Cadillac Code

1. What does the OBDII code P15BA mean on a Cadillac?

P15BA indicates that the Electric A/C Compressor Control Module has detected a high voltage condition in the Ignition On/Start Switch Circuit.

2. What are the common symptoms of a P15BA code?

Symptoms may include the A/C system not functioning, reduced cooling performance, an illuminated check engine light, or unusual electrical issues related to the A/C system.

3. What causes a P15BA code to appear on a Cadillac?

Common causes include a malfunctioning A/C compressor control module, damaged wiring or connectors, a faulty ignition switch, or a short to voltage in the circuit.

4. Can a bad A/C compressor cause the P15BA code?

Yes, a faulty A/C compressor or its control module can trigger this code if it is causing electrical issues in the ignition circuit.

5. How is the P15BA code diagnosed?

A technician will typically inspect the wiring and connectors for damage, test the voltage in the circuit, check the A/C control module, and use a scan tool to monitor sensor data.

6. Can I still drive my Cadillac with a P15BA code?

While the vehicle may still be drivable, the A/C system may not work properly, and ignoring the issue could lead to further electrical problems.

7. How do you fix a P15BA code on a Cadillac?

Repairs may include replacing the A/C compressor control module, repairing damaged wiring or connectors, or addressing a faulty ignition switch.

8. How much does it cost to fix a P15BA code?

Repair costs can vary, but replacing the A/C compressor control module could cost between $500 and $1,200, depending on labor and parts.

9. Can a blown fuse cause the P15BA code?

A blown fuse related to the A/C control module or ignition circuit could potentially cause this code, so fuses should be checked during diagnosis.

10. Will clearing the code fix the P15BA issue?

Clearing the code with a scan tool will not resolve the underlying issue; proper diagnosis and repair are required to prevent the code from returning.