C1939 Lincoln Code - Brake Pressure Switch Input Circuit Failure
Quick Answer
The C1939 diagnostic trouble code for Lincoln vehicles indicates a Brake Pressure Switch Input Circuit Failure. Common causes include Faulty brake pressure switch, Damaged wiring or connectors in the brake pressure switch circuit, Corrosion or contamination in the brake pressure switch input 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
- C1939 Lincoln indicates Brake Pressure Switch Input Circuit Failure.
- Common causes
- Common causes include Faulty brake pressure switch, Damaged wiring or connectors in the brake pressure switch circuit, Corrosion or contamination in the brake pressure switch input 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.
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Code C1939 Lincoln Description
The C1939 diagnostic trouble code for Lincoln vehicles indicates a Brake Pressure Switch Input Circuit Failure. This code is typically triggered when the brake pressure switch, which is responsible for monitoring the hydraulic pressure in the brake system, fails to send the correct signal to the vehicle's electronic control module (ECM). The brake pressure switch plays a crucial role in ensuring proper brake function and safety while driving. When this circuit fails, it can lead to issues with the vehicle's braking system, potentially compromising the overall safety and performance of the vehicle.
Common Causes of C1939 Lincoln
- Faulty brake pressure switch.
- Damaged wiring or connectors in the brake pressure switch circuit.
- Corrosion or contamination in the brake pressure switch input circuit.
- Issues with the electronic control module (ECM) receiving the signal from the brake pressure switch.
- Electrical issues within the vehicle's brake system.
Symptoms of C1939 Lincoln
- Illumination of the Check Engine Light on the dashboard.
- Decreased brake performance or responsiveness.
- ABS (Anti-lock Braking System) warning light may come on.
- Inconsistent brake pedal feel or sponginess.
- Potential loss of brake assist functionality.
How to Fix C1939 Lincoln
- Begin by diagnosing the specific cause of the Brake Pressure Switch Input Circuit Failure using a diagnostic scanner to retrieve the trouble codes.
- Inspect the brake pressure switch, wiring, and connectors for any signs of damage, corrosion, or contamination. Replace any faulty components as needed.
- Test the brake pressure switch input circuit to ensure proper signal transmission to the ECM.
- Clear the trouble codes from the ECM's memory and reset the Check Engine Light.
- Perform a road test to verify that the issue has been resolved and that the brake system is functioning correctly.
Cost to Fix C1939 Lincoln
The typical repair costs for addressing a Brake Pressure Switch Input Circuit Failure can range from $150 to $300, including parts and labor. However, it's important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate before proceeding with the repair.
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Frequently Asked Questions about C1939 Lincoln Code
1. What are the common symptoms of OBDII code C1939 in a Lincoln related to Brake Pressure Switch Input Circuit Failure?
- Common symptoms include the illumination of the check engine light, issues with the brake system, and potential difficulty shifting gears.
2. What are some possible causes of OBDII code C1939 in a Lincoln indicating Brake Pressure Switch Input Circuit Failure?
- The code may be triggered by a faulty brake pressure switch, damaged wiring or connectors in the brake pressure switch circuit, or a malfunctioning brake control module.
3. How can I diagnose OBDII code C1939 in my Lincoln for Brake Pressure Switch Input Circuit Failure?
- Diagnosis involves using an OBDII scanner to retrieve the specific code, inspecting the brake pressure switch and its wiring for any visible damage, and testing the switch for proper functionality.
4. What repair steps can I take to address OBDII code C1939 in my Lincoln related to Brake Pressure Switch Input Circuit Failure?
- Repair may involve replacing the brake pressure switch, repairing or replacing damaged wiring or connectors, or reprogramming the brake control module if necessary.
5. Can I continue to drive my Lincoln with OBDII code C1939 indicating 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 potentially compromise safety.
6. How much does it typically cost to repair OBDII code C1939 in a Lincoln due to Brake Pressure Switch Input Circuit Failure?
- Repair costs can vary depending on the specific issue, but they may range from $100 to $300 for parts and labor.
7. Are there any preventive measures I can take to avoid OBDII code C1939 in my Lincoln related to Brake Pressure Switch Input Circuit Failure?
- Regular inspection and maintenance of the brake system, including checking the brake pressure switch and its wiring, can help prevent this issue from occurring.
8. Can a DIY enthusiast with some automotive knowledge repair OBDII code C1939 in a Lincoln for Brake Pressure Switch Input Circuit Failure?
- Depending on the exact cause of the issue, some DIY repairs may be possible, but it is recommended to consult a professional mechanic for accurate diagnosis and repair.
9. Will resetting the OBDII code C1939 in my Lincoln related to Brake Pressure Switch Input Circuit Failure make it go away permanently?
- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear.
10. Is OBDII code C1939 specific to Lincolns, or can it occur in other vehicle makes and models as well?
- While this code is associated with Lincolns, similar issues related to the brake pressure switch input circuit failure can occur in other vehicle makes and models as well.
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