Engine-CodesMercury – C2803 Mercury

C2803 Mercury Code - Brake Pressure Transducer Sense Circuit Failure

Quick Answer

The C2803 diagnostic trouble code (DTC) for Mercury vehicles indicates a Brake Pressure Transducer Sense Circuit Failure. Common causes include Faulty brake pressure transducer sensor, Damaged or corroded wiring in the sensor circuit, Issues with the ECU or related control modules. 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
C2803 Mercury indicates Brake Pressure Transducer Sense Circuit Failure.
Common causes
Common causes include Faulty brake pressure transducer sensor, Damaged or corroded wiring in the sensor circuit, Issues with the ECU or related control modules.
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.
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code C2803 Mercury Description

The C2803 diagnostic trouble code (DTC) for Mercury vehicles indicates a Brake Pressure Transducer Sense Circuit Failure. This code is typically associated with issues in the brake system's pressure transducer sensor circuit, which is responsible for monitoring brake fluid pressure within the hydraulic system. The brake pressure transducer is a crucial component that helps ensure proper brake performance and safety by providing feedback to the vehicle's electronic control unit (ECU) about the pressure applied during braking.

OBDII Code C2803 Mercury - Brake Pressure Transducer Sense Circuit Failure
C2803 Mercury Code - Brake Pressure Transducer Sense Circuit Failure

Common Causes of C2803 Mercury

  1. Faulty brake pressure transducer sensor.
  2. Damaged or corroded wiring in the sensor circuit.
  3. Issues with the ECU or related control modules.
  4. Low brake fluid levels or contaminated brake fluid.
  5. Electrical issues such as blown fuses or relays.

Symptoms of C2803 Mercury

  1. Illumination of the brake warning light on the dashboard.
  2. Inconsistent or spongy brake pedal feel.
  3. Reduced braking performance or longer stopping distances.
  4. ABS system malfunctions or errors.
  5. Loss of brake assist functionality.

How to Fix C2803 Mercury

  1. Diagnose the issue by using a scan tool to retrieve the DTC and inspect the brake pressure transducer sensor and circuit.
  2. Check the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  3. Test the brake pressure transducer sensor to ensure it is functioning correctly, replacing it if faulty.
  4. Clear the DTC from the ECU's memory and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the brake system.

Cost to Fix C2803 Mercury

The typical repair costs for addressing a Brake Pressure Transducer Sense Circuit Failure can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, parts for this repair can range from $100 to $300, while labor costs may range from $150 to $300. Overall, the total cost for resolving this issue could fall within the range of $250 to $600. It's important to note that these estimates are approximate and actual costs may vary based on factors such as location, vehicle make and model, and the shop's labor rates. It's recommended to obtain quotes from local auto repair shops for a more accurate cost 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 C2803 Mercury Code

1. What are the common symptoms of OBDII code C2803 in a Mercury related to Brake Pressure Transducer Sense Circuit Failure?

The common symptoms include the illumination of the Check Engine Light on the dashboard, decreased brake performance, and potential issues with the vehicle's stability control system.

2. What are the possible causes of OBDII code C2803 in a Mercury indicating Brake Pressure Transducer Sense Circuit Failure?

The code C2803 can be triggered by issues such as a faulty brake pressure transducer, damaged wiring or connectors in the brake pressure sensor circuit, or a malfunctioning stability control module.

3. How can I diagnose OBDII code C2803 in a Mercury for Brake Pressure Transducer Sense Circuit Failure?

Diagnosing this code involves using a professional OBDII scanner to read the fault codes, testing the brake pressure transducer and its circuit for continuity and proper voltage, and inspecting the wiring and connectors for any signs of damage.

4. What are the repair options for OBDII code C2803 in a Mercury related to Brake Pressure Transducer Sense Circuit Failure?

Repair options include replacing the faulty brake pressure transducer, repairing or replacing damaged wiring or connectors, and reprogramming the stability control module if necessary.

5. Can I drive my Mercury with OBDII code C2803 indicating Brake Pressure Transducer Sense Circuit Failure?

It is not recommended to drive the vehicle with this code present, as it can lead to compromised brake performance and potentially unsafe driving conditions. It's best to address the issue promptly.

6. How much does it cost to repair OBDII code C2803 in a Mercury for Brake Pressure Transducer Sense Circuit Failure?

The cost of repairs can vary depending on the specific cause of the issue, the extent of the damage, and the labor rates in your area. It's advisable to get a diagnostic assessment from a qualified mechanic for an accurate estimate.

7. Can OBDII code C2803 in a Mercury be reset without fixing the underlying issue with the Brake Pressure Transducer Sense Circuit?

Resetting the code without addressing the root cause may temporarily turn off the Check Engine Light, but the issue will likely resurface. It's crucial to fix the problem to ensure the vehicle's safety and performance.

8. Is OBDII code C2803 in a Mercury related to Brake Pressure Transducer Sense Circuit Failure a common issue?

While not extremely common, issues with brake pressure transducers and related circuits can occur in vehicles, including Mercurys. Proper maintenance and timely repairs can help prevent such problems.

9. Can a DIY enthusiast repair OBDII code C2803 in a Mercury for Brake Pressure Transducer Sense Circuit Failure?

Depending on your skill level and access to tools, some DIY enthusiasts may be able to address this issue by following repair guides and tutorials. However, complex electrical systems and safety components are involved, so caution is advised.

10. How long does it typically take to repair OBDII code C2803 in a Mercury for Brake Pressure Transducer Sense Circuit Failure?

The repair time can vary based on the specific issue and the expertise of the mechanic. In general, it may take a few hours to a full day to diagnose and repair the problem, but this can differ case by case.

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