AutoCodes – Buick – P15A3 Buick

P15A3 Buick Code - Stop/Start Select Switch Circuit Signal Message Counter Incorrect

Quick Answer

The Engine Control Module (ECM) receives the Stop/Start switch speed signal via Control Area Network (CAN) from the Body Control Module (BCM). Common causes include Faulty Stop/Start Select Switch, Stop/Start Select Switch harness is open or shorted, Stop/Start Select Switch 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: P15A3 Buick indicates Stop/Start Select Switch Circuit Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Stop/Start Select Switch, Stop/Start Select Switch harness is open or shorted, Stop/Start Select Switch 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 945

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 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P15A3 Buick Description

The Engine Control Module (ECM) receives the Stop/Start switch speed signal via Control Area Network (CAN) from the Body Control Module (BCM). The Engine Control Module (ECM) monitors the Stop/Start Select Switch. The ECM sets the OBDII code when the Stop/Start Select Switch is not to factory specifications.

OBDII Code P15A3 Buick - Stop/Start Select Switch Circuit Signal Message Counter Incorrect - AutoCodes.com — P15A3 Buick Code - Stop/Start Select Switch Circuit Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P15A3 Buick?

Faulty Stop/Start Select Switch
Stop/Start Select Switch harness is open or shorted
Stop/Start Select Switch circuit poor electrical connection

How to Fix the DTC P15A3 Buick?

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 P15A3 Buick 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.