Any idea why I would get a P28AA - BOV - Bypass valve code after top end rebuild?
#1
Any idea why I would get a P28AA - BOV - Bypass valve code after top end rebuild?
Im getting this code P28AA now after hard acceleration on quick deceleration. Other than that its running great after the top end re build. Anyone have ideas before I check with the dealer. I really don't want to after I did all that work!! Thanks!
#2
#3
#5
#7
The code only throws if I quickly let my foot off the gas. If I get on the gas and then slowly let the gas off I get no code. To me it's almost like maybe it's not dumping enough boost.
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#11
Many times the P2885 code is a companion code to another fault. Also a descriptive code for limp mode, not just a boost deviance, you need to find a dealer level tech tool and really see what is going on, a generic P-reader isn't going to cut it.
#15
Checked and double checked, everything is good.
Discovered last night that my blowoff valves rubber diaphragm got shredded. Any idea what would cause that? Turbo only has 20 to 30k so its not age. I looked at it days before it blew and it looked fine. Could I be getting too much boost some how or not dumping enough boost?
Actuator arm on wastegate moves as it should. Not 100% sure how to check the Boost control unit bolts. I looked with a camera and all looked well. Should I pop the intake off? What am I looking for? I didn't mess with it when I did the top end rebuild besides taking it off and putting it back on.
Discovered last night that my blowoff valves rubber diaphragm got shredded. Any idea what would cause that? Turbo only has 20 to 30k so its not age. I looked at it days before it blew and it looked fine. Could I be getting too much boost some how or not dumping enough boost?
Actuator arm on wastegate moves as it should. Not 100% sure how to check the Boost control unit bolts. I looked with a camera and all looked well. Should I pop the intake off? What am I looking for? I didn't mess with it when I did the top end rebuild besides taking it off and putting it back on.
Last edited by Semaphore; 08-10-2016 at 08:54 AM.
#16
#17
Yep I know the one. It had been working for about 500miles then it blew out. I put the bov from the old turbo in and I think its blown as well. That one only lasted 50mi.....
#18
Checked and double checked, everything is good. Discovered last night that my blowoff valves rubber diaphragm got shredded. Any idea what would cause that? Turbo only has 20 to 30k so its not age. I looked at it days before it blew and it looked fine. Could I be getting too much boost some how or not dumping enough boost? Actuator arm on wastegate moves as it should. Not 100% sure how to check the Boost control unit bolts. I looked with a camera and all looked well. Should I pop the intake off? What am I looking for? I didn't mess with it when I did the top end rebuild besides taking it off and putting it back on.
i would guess its that rubber is blowing air out! i would start by getting a new one
#19
Put a new BOV in and that seemed to do the trick! Thanks for the help everyone!! I don't understand why the old one went out as it worked for about 500mi although it was throwing a code the whole time (it had 20k -30k on it). With the new BOV it doesn't seem to have as much boost though.
Before I bought the new BOV I tried A vacuum operated BOV and couldn't get it to work which was a bummer because people have a lot of great things to say about them....
Bottom line is it seems to be working great now and has worked for the last 300mi. All of the hard work I did on the engine rebuild feels like it has paid off now... what a relief!
Before I bought the new BOV I tried A vacuum operated BOV and couldn't get it to work which was a bummer because people have a lot of great things to say about them....
Bottom line is it seems to be working great now and has worked for the last 300mi. All of the hard work I did on the engine rebuild feels like it has paid off now... what a relief!
#22
Thanks for the order.
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