AutoCodes – Cadillac – P15A3 Cadillac

P15A3 Cadillac 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 Cadillac 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 1,128

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
FAQs
Comments
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Code P15A3 Cadillac 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 Cadillac - Stop/Start Select Switch Circuit Signal Message Counter Incorrect - AutoCodes.com — P15A3 Cadillac Code - Stop/Start Select Switch Circuit Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P15A3 Cadillac?

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 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 P15A3 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 P15A3 Cadillac Code

1. What are the common symptoms of OBDII code P15A3 in a Cadillac related to the Stop/Start Select Switch Circuit Signal Message Counter Incorrect?

- Common symptoms may include the stop/start system not functioning properly, the engine not turning off at stops, and a warning light on the dashboard.

2. What could cause the OBDII code P15A3 to appear in a Cadillac?

- Possible causes include a faulty stop/start select switch, wiring issues in the circuit, or a malfunction in the control module.

3. How can I diagnose the issue related to the Stop/Start Select Switch Circuit Signal Message Counter Incorrect code?

- Using a diagnostic scanner to read the code, checking the wiring and connections related to the switch, and testing the switch itself can help diagnose the problem.

4. Can I continue driving my Cadillac with the P15A3 code present?

- It is not recommended to ignore the code, as it may lead to further issues with the stop/start system or affect the overall performance of the vehicle.

5. What are some repair tips for fixing the Stop/Start Select Switch Circuit Signal Message Counter Incorrect code in a Cadillac?

- Repair tips may include checking and cleaning the switch contacts, repairing any damaged wiring, or replacing the faulty switch or control module.

6. Is it possible to reset the OBDII code P15A3 in a Cadillac without fixing the underlying issue?

- Resetting the code without addressing the root cause will only temporarily clear the warning light, and the issue will likely reoccur.

7. How much does it typically cost to repair the P15A3 code in a Cadillac?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the switch or control module, which could range from a few hundred to a few thousand dollars.

8. Can a DIY enthusiast fix the Stop/Start Select Switch Circuit Signal Message Counter Incorrect code in a Cadillac?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the issue themselves, especially if it involves simple tasks like checking connections or cleaning contacts.

9. Will fixing the P15A3 code improve fuel efficiency in a Cadillac?

- Restoring the proper function of the stop/start system by addressing the code may help improve fuel efficiency by reducing unnecessary idling and optimizing engine performance.

10. How long does it usually take to repair the Stop/Start Select Switch Circuit Signal Message Counter Incorrect issue in a Cadillac?

- The repair time can vary based on the complexity of the problem and the availability of parts, but it typically takes a few hours to a day to diagnose and fix the P15A3 code in a Cadillac.