C1939 Ford Code - Brake Pressure Switch Input Circuit Failure
Quick Answer
The C1939 Ford code indicates a Brake Pressure Switch Input Circuit Failure. Common causes include Faulty brake pressure switch, Damaged wiring harness, Loose or corroded connectors. 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
- C1939 Ford indicates Brake Pressure Switch Input Circuit Failure.
- Common causes
- Common causes include Faulty brake pressure switch, Damaged wiring harness, Loose or corroded connectors.
- 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 C1939 Ford Description
The C1939 Ford code indicates a Brake Pressure Switch Input Circuit Failure. This means that the vehicle's onboard computer has detected an issue with the brake pressure switch input circuit, which is responsible for signaling to the vehicle's systems when the brake pedal is pressed. The brake pressure switch is crucial for the proper functioning of the vehicle's brake system, as it helps control various aspects of the braking system, such as activating the brake lights, disengaging cruise control, and engaging the brake assist system.
Common Causes of C1939 Ford
- Faulty brake pressure switch
- Damaged wiring harness
- Loose or corroded connectors
- Faulty onboard computer
- Electrical issues
Symptoms of C1939 Ford
- Non-functioning brake lights
- Cruise control not disengaging when brake pedal pressed
- Brake assist system not engaging
- Illuminated brake warning light on the dashboard
How to Fix C1939 Ford
- Begin by diagnosing the root cause of the issue using a diagnostic scanner to retrieve the trouble code.
- Inspect the brake pressure switch, wiring harness, and connectors for any signs of damage or corrosion.
- Test the brake pressure switch for continuity and proper functioning.
- Replace the faulty brake pressure switch, wiring harness, or connectors as needed.
- Clear the trouble code from the vehicle's onboard computer and test the system to ensure proper functioning.
Cost to Fix C1939 Ford
The typical repair costs for a Brake Pressure Switch Input Circuit Failure can range from $100 to $300, depending on the specific cause of the issue and the cost of parts. Labor rates at auto repair shops can vary between $80 and $150 per hour, so the total cost may vary based on the shop's location and rates. It's advisable to consult with a mechanic or auto repair shop for a more accurate cost estimate based on the specific vehicle make and model.
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Frequently Asked Questions about C1939 Ford Code
1. What are the common symptoms of OBDII code C1939 Ford (Brake Pressure Switch Input Circuit Failure)?
- Common symptoms include the illumination of the brake warning light on the dashboard, issues with the brake system functionality, and potential loss of brake performance.
2. What can cause the OBDII code C1939 Ford to trigger?
- The code C1939 Ford is usually triggered by a faulty brake pressure switch, damaged wiring or connectors in the brake pressure switch circuit, or an issue with the brake control module.
3. How serious is the Brake Pressure Switch Input Circuit Failure OBDII code C1939 Ford?
- The code C1939 Ford is a serious issue as it directly affects the proper functioning of the brake system, which is a critical component for vehicle safety. It is important to address this code promptly.
4. Can I continue driving with the OBDII code C1939 Ford active?
- It is not recommended to continue driving with the C1939 Ford code active, as it can lead to potential brake system malfunctions and compromise vehicle safety. It is best to address the issue as soon as possible.
5. How can I diagnose the cause of OBDII code C1939 Ford (Brake Pressure Switch Input Circuit Failure)?
- Diagnosing the code typically involves using a scan tool to retrieve the fault codes, checking the brake pressure switch and its wiring for any visible damage, and testing the brake pressure switch circuit for proper functionality.
6. What are some repair tips for fixing the Brake Pressure Switch Input Circuit Failure OBDII code C1939 Ford?
- Repair tips may include replacing the faulty brake pressure switch, repairing or replacing damaged wiring or connectors, and clearing the code with a scan tool after completing the repairs.
7. Is it possible to reset the OBDII code C1939 Ford without fixing the underlying issue?
- Resetting the code without addressing the underlying issue will only temporarily turn off the warning light. The code is likely to reappear if the root cause of the problem is not resolved.
8. How much does it typically cost to repair the OBDII code C1939 Ford (Brake Pressure Switch Input Circuit Failure)?
- The cost of repair can vary depending on the extent of the issue and whether the repair is done at a dealership or an independent mechanic. It's advisable to get a diagnostic and repair estimate from a professional.
9. Are there any preventive maintenance steps to avoid the OBDII code C1939 Ford in the future?
- Regular inspection of the brake system, including the brake pressure switch and its wiring, can help prevent issues that may trigger the C1939 Ford code. Additionally, following the manufacturer's recommended maintenance schedule is crucial.
10. Can the OBDII code C1939 Ford be related to other brake system problems?
- Yes, the C1939 Ford code can be related to other brake system problems, as it indicates a fault in the brake pressure switch circuit. It is important to address this code promptly and inspect the entire brake system for any potential issues.
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