Ecu light started coming on today. But only under hard throttle and around 5000 rpm the car starts to judder. then clears and keeps on pulling.
I get the following Codes.
116: Boost Pressure (Above Upper Limit)
12 Diagnosis Initiated
13 Lambda Sensor (Open Circuit)
I have got a Race X Digital Boost Guage fitted, and it showed 8.5 Psi Overboost and 5.3 Psi Normal boost using the standard electronic boost controller.
I fitted a manual boost controller and set it to 8.5 Psi and the car Goes Like H*ll and has been working ok for a couple of weeks.
I can only assume the race x Boost Guage is Faulty. hence the low reading on boost. If it is not faulty then what can the problem be?
Also what is code 12 all about?
And why do i have code 13 coming up. bearing in mind my ecu light only comes on under hard throttle.