C1479 Mercury Code - Rear Left Wheel Brake Pressure Control Plausibility Failure
Quick Answer
The Hydraulic Control Unit (HCU) monitors the Rear Left Wheel Brake Pressure. Common causes include Brake System Bleeding, Faulty Hydraulic Control Unit (HCU), Hydraulic Control Unit (HCU) harness is open or shorted. 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
- C1479 Mercury indicates Rear Left Wheel Brake Pressure Control Plausibility Failure.
- Common causes
- Common causes include Brake System Bleeding, Faulty Hydraulic Control Unit (HCU), Hydraulic Control Unit (HCU) harness is open or shorted.
- 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 C1479 Mercury Description
What are the Possible Causes of the DTC C1479 Mercury?
- Brake System Bleeding
- Faulty Hydraulic Control Unit (HCU)
- Hydraulic Control Unit (HCU) harness is open or shorted
- Hydraulic Control Unit (HCU) circuit poor electrical connection
How to Fix the DTC C1479 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 C1479 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 C1479 Mercury Code
1. What does the OBDII code C1479 mean on a Mercury vehicle?
C1479 indicates a "Rear Left Wheel Brake Pressure Control Plausibility Failure," meaning the ABS module has detected an issue with brake pressure control for the rear left wheel.
2. What are the common symptoms of code C1479 in a Mercury vehicle?
Symptoms may include the ABS warning light turning on, reduced braking performance, or the ABS system not functioning properly.
3. What causes the C1479 code to appear?
Potential causes include a faulty ABS module, damaged or corroded wiring, a malfunctioning rear left wheel brake pressure sensor, or hydraulic issues in the brake system.
4. Can you drive with the C1479 code active?
While the vehicle may still be drivable, the ABS system may not function as intended, potentially causing reduced safety during hard braking or slippery conditions.
5. How do you diagnose the C1479 code?
Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the rear left wheel brake pressure sensor and wiring, and testing the ABS module for proper operation.
6. How is the C1479 code typically fixed?
Repairs may include replacing the rear left wheel brake pressure sensor, repairing or replacing damaged wiring, or recalibrating or replacing the ABS module if necessary.
7. How much does it cost to repair the C1479 code?
Repair costs can vary but may range from $150 to $500, depending on whether the issue is with a sensor, wiring, or the ABS module.
8. Can low brake fluid cause the C1479 code?
While low brake fluid typically triggers other codes, it can potentially contribute to braking issues. Always ensure the brake fluid is at the correct level before further diagnosing.
9. Does the C1479 code affect the entire braking system?
No, it specifically relates to the rear left wheel brake pressure control, but it can impact the overall performance of the ABS system.
10. Can clearing the C1479 code solve the problem?
Clearing the code will not solve the underlying issue. Proper diagnosis and repair are required to address the root cause of the problem.
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