Re the picture, both are identical components but no 1 is referred to as the Turbo Control Valve (TCV) and no2 is the 'Anti Stutter Valve. Both are solenoids.
I had similar issues to yours (variety of codes - P2263, P0234, P2035) but replacing the TCV (£40) made no difference. I'd start by checking all vacuum lines for leaks. Apart from the TCV, I replaced the MAP sensor - whose full title is MAP and Boost sensor (£9). The throttle body was coated in oil/crud so cleaned that and the Temperature sensor too. Car ran better but still jerking / limp mode. Gave up trying to reach the Anti Stutter Valve!
In desperation, took it to an indy Volvo garage. VIDA checks showed not fuel or turbo issues (relief) so they used a smoke generator to check the vacuum hoses and found a small leak where the intercooler pipe joins the throttle body. Car now ok. Garage bill £125 but they not only worked on it for longer than they billed me, they also did a full road test including live data check.
Last edited by Tonypilk; May 2nd, 2019 at 10:55.
Reason: Missed expanation
|