Hi all,
I am new here and need some help!
I just put a new head on our S80, the car is running great, but I am getting a error code. It reads P123/ECM Turbocharger control valve.
It then reads: If RPM is above 3500 and engine is operating at a high load, control signal to turbo control valve is at maximum and boost pressure from boostpressure sensor is lower than approximately 2.9 psi under normal boost pressure signal to low. If mass air flow sensor is higher than a desired value it is interpreted as a falt and ECM-6806 is stored

Reduced boost pressure is used as a substitute value while ECM-6806 is set.



Has anyone had these code or can give me advise as to what to do?

Thanks
Dan

 

You might have an air leak in the plastic tubing over the engine.
Or between the intercooler and the throttle body.
Have you checked all that stuff yet?

 

I just got the readout last night. I will check that tomarrow. Thanks for the info and anymore that you are willing tho throw my way.
Have a good one!
Dan