PID 70kPa
Commanded boost pressure
The boost pressure the unit is aiming for.
What is normal
What matters is not the number itself but the gap to the actual pressure: that is what says whether the turbo is keeping up.
These figures hold for most cars, but the maker has the last word: some engines run hotter or idle higher by design.
Codes about this parameter
Codes behind this reading
If the value is out of range, the unit usually says so with one of these codes.
P0234Turbocharger boost pressure too highP0299Turbocharger boost pressure too lowP2263Turbocharger boost system performance
How it feels behind the wheel
The same fault shows itself in different ways. Each sign below says what to look at in the live data.
The revs are capped and the car will not accelerateThe pedal is flat to the floor but the engine caps out around three thousand and goes no further. The car moves, but sluggishly, and overtaking is impossible. The check light is often on.It jerks under accelerationAt steady throttle everything is fine, but under acceleration the car jerks or hesitates, as if the pedal was released for a moment.The car has lost powerThe car moves, but sluggishly: flooring the throttle changes nothing, the revs climb reluctantly. Often the lamp is on as well.
How to see it
In CarScan: the Live data tab, «Start polling». The app asks the car several times per second, draws a graph and remembers the highest and lowest value of the trip.