Technical Section > Troubleshooting

Vacuum pump sensor

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Barkered:
Hello,

My Cx5 is showing the dreaded P258B, vacuum pump error.

I've tried clearing various sensors out but the error returns.

I don't experience any stiffness with the brakes, so I'm not convinced it's the actual pump.

Is there a dedicated sensor I can maybe replace or clean before I look to replace the pump?

Cheers.

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