I have a 95 850t. I keep getting these codes 131, 137 and 141. I clear them and these usually reappear after about 50 miles of driving, usually on the freeway. There is no drivability issue e.g. hard starting or misfires etc.

I have throughly checked and replaced all the vacume lines.

Installed a new fuel filter.

Cleaned all parts of the oil seperator system.

Replaced the intake manifold gasket.

Recently replaced the cat with new bosal unit.

Repalced both O2 sensers.

Cleaned the mass air flow sensor.

Double checked and tightened all the turbo clamps

Car is an auto with 106k

Suggestions would be greatly appreciated

Thank You

 

Not sure what the codes are but if the car is running well, I would not throw any more parts at it without knowing exactly what is wrong with it.

The stealer will usually tell you what is wrong for $75.