C1939 Mercury Code - Brake Pressure Switch Input Circuit Failure
Quick Answer
The Anti-Lock Brake System (ABS) Module monitors the Brake Pressure Switch (BPS). Common causes include Faulty Brake Pressure Switch (BPS), Brake Pressure Switch (BPS) harness is open or shorted, Brake Pressure Switch (BPS) 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
- C1939 Mercury indicates Brake Pressure Switch Input Circuit Failure.
- Common causes
- Common causes include Faulty Brake Pressure Switch (BPS), Brake Pressure Switch (BPS) harness is open or shorted, Brake Pressure Switch (BPS) 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.
Code C1939 Mercury Description
What are the Possible Causes of the DTC C1939 Mercury?
- Faulty Brake Pressure Switch (BPS)
- Brake Pressure Switch (BPS) harness is open or shorted
- Brake Pressure Switch (BPS) circuit poor electrical connection
How to Fix the DTC C1939 Mercury?
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 C1939 Mercury 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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Frequently Asked Questions about C1939 Mercury Code
1. What are the common symptoms of OBDII code C1939 Brake Pressure Switch Input Circuit Failure in a Mercury?
- Common symptoms include the brake warning light illuminating on the dashboard, issues with the brake system, and potential ABS malfunction.
2. What can cause the OBDII code C1939 Brake Pressure Switch Input Circuit Failure in a Mercury?
- The code can be triggered by a faulty brake pressure switch, damaged wiring in the brake pressure switch circuit, or a malfunctioning ABS module.
3. How can I diagnose the OBDII code C1939 Brake Pressure Switch Input Circuit Failure in my Mercury?
- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, inspecting the brake pressure switch and its wiring for damage, and testing the ABS module for any faults.
4. Is it safe to drive my Mercury with the OBDII code C1939 Brake Pressure Switch Input Circuit Failure?
- It is not recommended to drive the vehicle with this code present, as it can affect the proper functioning of the brake system and ABS, potentially compromising safety.
5. What are some repair tips for addressing the OBDII code C1939 Brake Pressure Switch Input Circuit Failure?
- Repair tips may include replacing the faulty brake pressure switch, repairing or replacing damaged wiring, and resetting the ABS module to clear the code.
6. Can I reset the OBDII code C1939 Brake Pressure Switch Input Circuit Failure in my Mercury without fixing the underlying issue?
- While you can clear the code with an OBDII scanner, it is important to address the root cause of the problem to prevent it from recurring and ensure the safety of your vehicle.
7. How much does it typically cost to repair the OBDII code C1939 Brake Pressure Switch Input Circuit Failure in a Mercury?
- The cost of repair can vary depending on the extent of the issue, but it may involve the price of a new brake pressure switch, wiring repairs, and labor costs for diagnosis and replacement.
8. Can a DIY enthusiast fix the OBDII code C1939 Brake Pressure Switch Input Circuit Failure in a Mercury?
- While some enthusiasts may have the skills to diagnose and repair this issue, it is recommended to have a professional mechanic handle the repair due to the complexity of the brake system and ABS.
9. Will the OBDII code C1939 Brake Pressure Switch Input Circuit Failure cause my Mercury to fail an emissions test?
- The code itself may not directly impact emissions, but it is important to address the issue promptly to ensure the overall health and safety of your vehicle.
10. How long can I safely drive my Mercury with the OBDII code C1939 Brake Pressure Switch Input Circuit Failure before getting it repaired?
- It is best to avoid driving the vehicle with this code present to prevent any potential safety hazards related to brake system and ABS malfunctions.
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