Volvo Owners Club Forum - View Single Post - 2011 S60- Intermittent limp mode

lastyboy · Jul 12th, 2018, 16:38

Hi all own a 2011 S60 Twin turbo D5.
For the past 3 months I have an intermittent fault.

Under boost- normally higher in the rev range the car goes into limp mode.

Only fault code is p029900 - Turbo underboost.

The car drive for 10 miles and be fine all the way too work. Other times it is awful - almost continually flat.

I am actually in the trade. Smoke tested the vehicle, cannot see any vac leaks at all. Put some turbo cleaner through the system and it improved it for a week and then got worse.

Any ideas?
Jim

Jul 12th, 2018, 16:38	#1
lastyboy New Member Last Online: Oct 16th, 2019 11:06 Join Date: May 2007 Location: NORWICH	2011 S60- Intermittent limp mode Hi all own a 2011 S60 Twin turbo D5. For the past 3 months I have an intermittent fault. Under boost- normally higher in the rev range the car goes into limp mode. Only fault code is p029900 - Turbo underboost. The car drive for 10 miles and be fine all the way too work. Other times it is awful - almost continually flat. I am actually in the trade. Smoke tested the vehicle, cannot see any vac leaks at all. Put some turbo cleaner through the system and it improved it for a week and then got worse. Any ideas? Jim