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aaronstern1

Peugeot Boxer Turbo Jerking Whistling

My 2012 Peugeot Boxer diesel is giving me grief. Check engine light's on, and it's jerking like crazy when I accelerate. I'm also hearing a whistling and loud hissing sound. Sometimes it even stalls at idle. MPG has gone to pot, and power's definitely down. I'm thinking it could be turbo related. Mileage is at 208949 km. Any ideas?

Summary of the thread

A 2012 Peugeot Boxer diesel was experiencing issues such as jerking during acceleration, a whistling and hissing sound, stalling at idle, reduced fuel efficiency, and decreased power, with the check engine light on. These symptoms suggested a potential turbo-related problem. A possible cause identified was a defective boost pressure sensor connection. After replacing the sensor and cable, the issues were resolved.

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4 comment(s)

fionalorenz76

Sounds like a boost leak. But a dodgy boost pressure sensor could also cause similar symptoms. Have you checked the hoses around the turbo and intercooler for any splits or loose connections?

aaronstern1 (community.author)

Where exactly should I be looking for the sensor, and what should I be checking for? I'm not really familiar with the turbo system on these.

fionalorenz76

It's usually on the intake manifold, or somewhere near the turbo itself. Look for a small sensor with a plug going into it. Check the cable and plug connection. If it is corroded or damaged, that's probably your culprit. Otherwise, it might be the sensor itself. Could be worth getting it scanned to confirm.

aaronstern1 (community.author)

I checked the plug, and the connection was indeed defective. Replaced the sensor and cable – cost me about 95€. All the symptoms are now gone!

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PEUGEOT

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BOXER