Exhaust GasTemp. Sensor
G235

The BAM engine , (225) has an exhaust gas temperature sender.

This is very near the turbo and if you are having running problems its possible that it is failing.

You should have an error code logged though, for example:-

1 Fault Found:
17862 - Exhaust Gas Temp Sensor 1 (G235): Short to Ground
P1454 - 35-00 - -

or

1 Fault Found:
17863 - Exhaust Gas Temp Sensor 1 (G235): Implausible Signal
P1455 - 35-10 - - - Intermittent

Then get it changed.