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thomas_johnson40

Sprinter diesel manifold pressure sensor issue

My 2015 Mercedes Sprinter diesel is giving me grief. The check engine light is on, and it seems to be a faulty manifold pressure sensor. I've got reduced engine power, sluggish response, and fuel consumption is up. Mileage is 182068 km. I suspect a vacuum leak affecting the MAP sensor, but I'm not sure where to start.

Summary of the thread

A 2015 Mercedes Sprinter diesel experienced issues with a check engine light, reduced engine power, sluggish response, and increased fuel consumption, suspected to be due to a faulty manifold pressure sensor. The problem was thought to be linked to a vacuum leak affecting the MAP sensor. Suggestions included checking hoses connected to the intake manifold for cracks or damage. Ultimately, a garage confirmed the manifold pressure sensor was faulty and causing a vacuum leak, and replacing the sensor resolved the issues.

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4 comment(s)

liam_schmitz79

Vacuum leak, huh? Check the hoses connected to the intake manifold. They crack and cause problems. It could be a simple fix, or the sensor itself might be bad.

thomas_johnson40 (community.author)

Thanks! When you say 'hoses connected to the intake manifold,' which specific hoses are you talking about? I want to check the right ones. And how would I know if the MAP sensor is the problem?

liam_schmitz79

I'm no mechanic, but there are diagrams online for the hose layout. The sensor might need replacing, based on your description. A workshop check might be best.

thomas_johnson40 (community.author)

Thanks. You were right about getting it checked. The garage said the manifold pressure sensor was bad and causing a vacuum leak. I replaced it, and the Sprinter is running well again. It cost 235€ for the sensor and labor.

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MERCEDES

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SPRINTER