2004 XC70 PO299 low boost

Herb Goltz · Post by **Herb Goltz** » 01 Nov 2020, 20:02

I have a 2004 XC70 with 85K miles on it that has sluggish performance compared to my 2006 XC70 with similar mileage. I don't have VIDA/DICE yet, as I recently bought these cars after 9 years with my previous 2000 V70. My 2000 was NA, and the acceleration performance was similar to my 2004. I scanned it with my ELM-327 and Torque app, and it came up with a pending PO299 (low boost).

The induction hoses look OK, and the 3 vacuum lines look good, although it was hard to see the ends behind the motor-- I will look more closely. I did pick up some used turbo solenoids (the one clipped to the airbox) last time I was at the pick-and-pull that I could try if this is a candidate for causing low boost.

Let me know what the "usual suspects" are for low boost. Thanks in advance!

Post by **RickHaleParker** » 02 Nov 2020, 01:33

Herb Goltz wrote: 01 Nov 2020, 20:02 Let me know what the "usual suspects" are for low boost. Thanks in advance!

Leaking Charged air pipes. The pressure escapes somewhere between the turbo and the intake manifold.