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AutoCodes - Generic - C1478

C1478 Code - Front Left Wheel Brake Pressure Control Plausibility Failure

- Code Popularity: 4,457 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC C1478?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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
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How to Fix the DTC C1478?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1478 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

Code C1478 Description

The Hydraulic Control Unit (HCU) monitors the Front Left Wheel Brake Pressure. The HCU sets the OBDII code when the Front Left Wheel Brake Pressure is not to factory specifications.

OBDII Code C1478 - Front Left Wheel Brake Pressure Control Plausibility Failure - AutoCodes.com
C1478 Code - Front Left Wheel Brake Pressure Control Plausibility Failure

Need More Information on the Code?

Need more information on how to fix the C1478 code? Get Access to Factory Service Manuals

Information for Specific Makes

  • C1478 Ford Front Left Wheel Brake Pressure Control Plausibility Failure
  • C1478 Lincoln Front Left Wheel Brake Pressure Control Plausibility Failure
  • C1478 Mercury Front Left Wheel Brake Pressure Control Plausibility Failure

Need Help with the Code?

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Code C1478 comments

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