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

Quick Answer

The P0703 diagnostic trouble code (DTC) on a 2015 Chevrolet Silverado indicates that the Brake Switch Signal Message Counter is incorrect. Common causes include Malfunctioning brake switch, Stuck brake switch, Wiring issues (short or open circuit). 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 Malfunctioning brake switch, Stuck brake switch, Wiring issues (short or open circuit).
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0703 2015 Chevrolet Silverado Description

The P0703 diagnostic trouble code (DTC) on a 2015 Chevrolet Silverado indicates that the Brake Switch Signal Message Counter is incorrect. This code is typically triggered when the vehicle's onboard computer detects an inconsistency in the number of brake switch signals received. The brake switch is a crucial component that informs the vehicle's computer when the brake pedal is pressed, allowing for proper operation of systems such as cruise control, traction control, and transmission shifting.

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

Common Causes of P0703 2015 Chevrolet Silverado

  1. Malfunctioning brake switch
  2. Stuck brake switch
  3. Wiring issues (short or open circuit)
  4. Faulty connections in the brake switch circuit
  5. Corrosion or damage to the brake switch wiring

Symptoms of P0703 2015 Chevrolet Silverado

  1. Inability to engage or disengage cruise control
  2. Jerky or delayed transmission shifts
  3. Stability issues during acceleration or braking
  4. Malfunctioning traction control system

How to Fix P0703 2015 Chevrolet Silverado

  1. Begin by diagnosing the root cause of the issue using a diagnostic scanner to retrieve the specific fault codes.
  2. Inspect the brake switch for any signs of damage or malfunction. Replace the brake switch if necessary.
  3. Check the wiring and connections in the brake switch circuit for any faults. Repair or replace damaged wiring as needed.
  4. Clear the fault codes from the vehicle's computer and test the system to ensure proper operation.
  5. Perform a road test to verify that the symptoms associated with the P0703 code have been resolved.

Cost to Fix P0703 2015 Chevrolet Silverado

The typical repair costs for addressing a P0703 code on a 2015 Chevrolet Silverado can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour, but rates may be higher in metropolitan areas or at dealerships, while independent shops often charge less. It's recommended to check local rates for a more accurate estimate.

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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 vehicle’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. It’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.

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