P0703 2016 GMC Sierra Code - Brake Switch Signal Message Counter Incorrect
Quick Answer
The P0703 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the Brake Switch Signal Message Counter is incorrect. Common causes include Faulty brake switch, Wiring issues, such as a short or open circuit, Malfunctioning vehicle computer. 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 2016 GMC Sierra indicates Brake Switch Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty brake switch, Wiring issues, such as a short or open circuit, Malfunctioning vehicle computer.
- 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 P0703 2016 GMC Sierra Description
The P0703 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the Brake Switch Signal Message Counter is incorrect. This code is typically triggered when the vehicle's onboard computer detects a discrepancy in the number of brake switch signals received compared to what is expected. The brake switch is a crucial component in the vehicle's braking system, as it sends a signal to the vehicle's computer when the brake pedal is depressed. This signal is used to activate the brake lights and assist in various safety systems, such as traction control and cruise control.
Common Causes of P0703 2016 GMC Sierra
- Faulty brake switch.
- Wiring issues, such as a short or open circuit.
- Malfunctioning vehicle computer.
- Corrosion or damage to the brake switch connectors.
- Improper adjustment of the brake switch.
Symptoms of P0703 2016 GMC Sierra
- Brake lights not illuminating when the brake pedal is pressed.
- Traction control system malfunction or warning light on the dashboard.
- Cruise control not engaging or disengaging unexpectedly.
- Vehicle going into limp mode, limiting performance.
How to Fix P0703 2016 GMC Sierra
- Begin by conducting a thorough inspection of the brake switch and its wiring to check for any visible damage or corrosion.
- Test the brake switch using a multimeter to ensure it is functioning properly and sending the correct signals.
- If the brake switch is faulty, replace it with a new, OEM-approved part.
- Clear the DTC from the vehicle's computer using a diagnostic scan tool.
- Test drive the vehicle to ensure that the issue has been resolved and that all systems are functioning correctly.
Cost to Fix P0703 2016 GMC Sierra
The typical repair costs for addressing a P0703 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of a new brake switch can range from $20 to $50, depending on the brand and quality. Labor costs for this repair can range from $80 to $150 per hour, with the total repair time likely to be around 1-2 hours. Therefore, the total cost for this repair could range from $100 to $300, including parts and labor. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the specific repair shop chosen. It's advisable to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.
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Frequently Asked Questions about P0703 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code P0703 on a 2016 GMC Sierra?
- Common symptoms include the Check Engine Light coming on, issues with shifting gears, and potential problems with the vehicle's brake lights.
2. What does the OBDII code P0703 Brake Switch Signal Message Counter Incorrect mean for a 2016 GMC Sierra?
- This code indicates that the vehicle's powertrain control module (PCM) has detected an incorrect number of messages from the brake switch signal.
3. What are the possible causes of OBDII code P0703 on a 2016 GMC Sierra?
- Possible causes include a faulty brake switch, wiring issues in the brake switch circuit, a defective PCM, or problems with the brake light circuit.
4. How serious is OBDII code P0703 Brake Switch Signal Message Counter Incorrect on a 2016 GMC Sierra?
- While the vehicle may still be drivable with this code, it is important to address it promptly as it can affect the proper operation of the transmission and brake lights.
5. Can I still drive my 2016 GMC Sierra with OBDII code P0703 present?
- It is generally not recommended to continue driving the vehicle with this code active, as it can lead to potential transmission issues or safety concerns related to brake light functionality.
6. How can I diagnose and repair OBDII code P0703 on a 2016 GMC Sierra?
- Diagnosing this code typically involves testing the brake switch, inspecting the wiring for damage, and checking the brake light operation. Repair may involve replacing a faulty brake switch or repairing wiring issues.
7. Is it possible to reset OBDII code P0703 on a 2016 GMC Sierra without fixing the underlying issue?
- While clearing the trouble code may temporarily turn off the Check Engine Light, it will likely reappear until the root cause of the problem, such as a faulty brake switch, is addressed.
8. Can a DIY enthusiast fix OBDII code P0703 on a 2016 GMC Sierra?
- Depending on their skill level, a DIY enthusiast may be able to address this code by replacing the brake switch or repairing wiring issues. However, it's recommended to consult a professional if unsure.
9. How much does it cost to repair OBDII code P0703 on a 2016 GMC Sierra at a dealership or repair shop?
- Repair costs can vary depending on the specific issue, but replacing a brake switch or addressing wiring problems related to this code may cost between $100 to $300 at a dealership or repair shop.
10. What are the long-term effects of ignoring OBDII code P0703 on a 2016 GMC Sierra?
- Ignoring this code can potentially lead to transmission problems or safety issues related to brake light malfunctions, so it is advisable to address the underlying cause promptly to prevent further complications.
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