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AutoCodes - Generic - C0286

C0286 Code - Medium Pressure Accumulator Switch Intermittent

- Code Popularity: 4,501 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC C0286?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Brake Pressure Modulator Valve (BPMV)
  • Brake Pressure Modulator Valve (BPMV) harness is open or shorted
  • Brake Pressure Modulator Valve (BPMV) circuit poor electrical connection
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How to Fix the DTC C0286?

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 C0286 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 C0286 Description

The Brake Pressure Modulator Valve (BPMV) contains a Medium Pressure Accumulator (MPA). The MPA provides pressure to the front brakes during certain VSES events. The MPA switch is included to monitor the status of the pressure accumulator. The MPA switch is open when the MPA is uncharged.
The integrity of the MPA switch is tested by the Electronic Brake Control Module (EBCM). The MPA is partially discharged during system initialization to open the switch and then recharged to close the switch. The EBCM continues to monitor the switch to ensure the MPA remains charged. Provided the VSES is not activated, the MPA should remain charged for the entire ignition cycle. If the MPA switch opens within 5 minutes of closing, a fast leak down condition is detected. If the MPA switch opens after 5 minutes has passed, a slow leak down condition is detected.

OBDII Code C0286 - Medium Pressure Accumulator Switch Intermittent - AutoCodes.com
C0286 Code - Medium Pressure Accumulator Switch Intermittent

Need More Information on the Code?

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Information for Specific Makes

  • C0286 Buick Medium Pressure Accumulator Switch Intermittent
  • C0286 Cadillac Medium Pressure Accumulator Switch Intermittent
  • C0286 Chevrolet Medium Pressure Accumulator Switch Intermittent
  • C0286 GMC Medium Pressure Accumulator Switch Intermittent

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Code C0286 comments

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