AutoCodes – Chevrolet – P0703 2015 Chevrolet Silverado

P0703 2015 Chevrolet Silverado Code - Brake Switch Signal Message Counter Incorrect

Quick Answer

The Body Control Module (BCM) monitors the brake pedal position sensor. Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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: P0703 2015 Chevrolet Silverado indicates Brake Switch Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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 335

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jul 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0703 2015 Chevrolet Silverado Description

The Body Control Module (BCM) monitors the brake pedal position sensor. When the brake pedal is applied, the BCM detects a predetermined voltage signal. The BCM sends a serial data message to the Engine Control Module (ECM) indicating the status of the stop lamps. The Diagnostic Trouble Code (DTC) will be set when the ECM receives an invalid brake pedal status serial data message from the BCM.

OBDII Code P0703 2015 Chevrolet Silverado - Brake Switch Signal Message Counter Incorrect - AutoCodes.com — P0703 2015 Chevrolet Silverado Code - Brake Switch Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P0703 2015 Chevrolet Silverado?

Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0703 2015 Chevrolet Silverado?

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 P0703 2015 Chevrolet Silverado 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.

Need more information about the P0703 2015 Chevrolet Silverado code?

Need more information on how to fix the P0703 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P0703 2015 Chevrolet Silverado Code

1. What does the OBDII code P0703 mean on a 2015 Chevrolet Silverado?

P0703 indicates an issue with the Brake Switch Signal Message Counter, suggesting the signal from the brake switch is not being received or processed correctly by the vehicleâ€™s control module.

2. What are the common symptoms of code P0703 in a 2015 Chevrolet Silverado?

Symptoms may include the brake lights not working properly, cruise control malfunctioning, the transmission not shifting correctly, or the check engine light turning on.

3. What causes the P0703 code to appear in a Chevrolet Silverado?

The most common causes are a faulty brake light switch, damaged or corroded wiring, a misadjusted brake switch, or a failure in the powertrain control module (PCM).

4. Can a faulty brake light switch cause transmission issues in a 2015 Silverado?

Yes, a faulty brake light switch can send incorrect signals to the transmission control module, potentially causing shifting problems.

5. How do I diagnose the P0703 code on my 2015 Chevrolet Silverado?

Start by checking the brake lights for proper operation, inspect the brake light switch for damage or misalignment, and examine the wiring and connectors for wear or corrosion. Use a scan tool to monitor the brake switch signal.

6. Can I drive my 2015 Silverado with a P0703 code?

While the vehicle may still be drivable, this code can affect critical systems like the brake lights and transmission. Itâ€™s recommended to address the issue promptly for safety and performance.

7. How do I fix the P0703 code on a 2015 Chevrolet Silverado?

Repairs may involve replacing the brake light switch, repairing or replacing damaged wiring, cleaning corroded connectors, or recalibrating the brake switch.

8. How much does it cost to fix the P0703 code on a 2015 Silverado?

Repair costs can vary, but replacing a brake light switch typically costs between $50 and $150, including parts and labor. Wiring repairs or module replacements may increase the cost.

9. Can a P0703 code trigger the check engine light on a 2015 Chevrolet Silverado?

Yes, a P0703 code will often trigger the check engine light, as it indicates a fault in the brake switch signal system monitored by the PCM.

10. How can I prevent the P0703 code from reoccurring in my Chevrolet Silverado?

Regularly inspect and maintain the brake light switch, wiring, and connectors. Avoid exposing electrical components to moisture or dirt to prevent corrosion.