C1478 - Front Left Wheel Brake Pressure Control Plausibility Failure

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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C1478 Possible 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

First diagnose C1478 code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the C1478 code

    Labor: 1.0

    The cost of diagnosing the C1478 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

C1478 Possible Symptoms

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

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 More Information

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C1478 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

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