C0286 Code - Medium Pressure Accumulator Switch Intermittent
Quick Answer
The Brake Pressure Modulator Valve (BPMV) contains a Medium Pressure Accumulator (MPA). Common causes include 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. 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
- C0286 indicates Medium Pressure Accumulator Switch Intermittent.
- Common causes
- Common causes include 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.
- 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 C0286 Description
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.
What are the Possible Causes of the DTC C0286?
- 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
How to Fix the DTC C0286?
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 C0286 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.
Need more information about the C0286 code?
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Need Help with the Code?
Get the C0286 code diagnosed by a professional: Find a repair shop in your area
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
Frequently Asked Questions about C0286 Code
1. What are the common symptoms of OBDII code C0286 - Medium Pressure Accumulator Switch Intermittent?
- Common symptoms include erratic ABS operation, illuminated ABS warning light, and potentially decreased braking performance.
2. What are the possible causes of OBDII code C0286?
- The code C0286 may be triggered by a faulty medium pressure accumulator switch, damaged wiring or connectors, low brake fluid level, or issues with the ABS module.
3. How can I diagnose the root cause of OBDII code C0286?
- Diagnosing the issue involves using a diagnostic scanner to read the code, checking the brake fluid level, inspecting wiring and connectors, and testing the medium pressure accumulator switch.
4. Can I continue driving my vehicle with OBDII code C0286 present?
- It is not recommended to drive the vehicle with code C0286 active, as it may affect the proper functioning of the ABS system and compromise braking performance.
5. How can I repair OBDII code C0286 - Medium Pressure Accumulator Switch Intermittent?
- Repairing the issue involves replacing the faulty medium pressure accumulator switch, repairing or replacing damaged wiring or connectors, and ensuring the ABS system is functioning correctly.
6. Are there any DIY tips for resolving OBDII code C0286?
- DIY tips include checking and topping up brake fluid, inspecting wiring for visible damage, and ensuring all connections are secure before seeking professional assistance.
7. What is the typical cost to repair OBDII code C0286?
- The cost of repairing OBDII code C0286 can vary depending on the root cause of the issue, but it may range from $100 to $500, including parts and labor.
8. How long does it take to fix OBDII code C0286?
- The repair time for OBDII code C0286 can vary based on the specific cause of the issue and the availability of parts, but it typically takes 1-2 hours to diagnose and resolve the problem.
9. Can OBDII code C0286 be triggered intermittently?
- Yes, the code C0286 can be triggered intermittently if the issue is related to intermittent faults in the medium pressure accumulator switch or its associated components.
10. Is it necessary to clear the OBDII code C0286 after repairs are completed?
- Yes, it is recommended to clear the code C0286 using a diagnostic scanner after repairs to reset the ABS system and ensure the issue has been successfully resolved.
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