Location of boost sensor on 2001 Volvo S60 2.4T

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Just above the brake pedal (will look like a push button)

The turbo pressure sensor is located in the inlet manifold. Check the wiring, clean the map sensor (pressure sensor), if still have the problem replace the sensor. They are not expensive.

the turbo boost sensor is on the intake manifold and can be replaced
http://www.citydiesel.net/turbo-boost-sensor-24-valve-cummins-p-151.html

bigger is not better when it comes to turbo units as Leyland found out when they fitted a turbo to a 690 diesel that resulted in the destruction of the engines and damage to the company reputation of a reliable engine manufacturer
Subsequent engineering found that a much smaller turbo produced more power without the destroying the engine
The turbo fitted to the engine originally is the correct unit for the maximum power that the engine mechanicals can handle
What you have to do is to ensure that the variable vanes of the turbo are working correctly and there are no boost pressures lost from intercooler leaks and loose hoses
Run the fault codes to determine sensor and actuators for the existing turbo are fully operational

the boost preasure sensor is located on rear of the cooling fan housing at rear of engine near air box, theres a turbo control valve and its located on the top of the engine in the back near air box, you can say its behind the driverside head light in engine compartment. hope this helps.

should be a little single wire connected to the air filter box. located on the clean side of the air filter. if not it will be between the air filter box and the throttle plate usually located on the air duct hose going from the air filter box to the throttle plate.

0237 is turbo/ super boost sensor a circuit malfunction
0236 is turbo/ super boost sensor a ckt range performance

P0236 Turbocharger Boost Sensor A Circuit ange/Performance and P0237 Turbocharger Boost Sensor A Circuit Low. I would check to ensure your Sensor is didnt come unplugged and if not I would replace the Boost Sensor. Thanks for Using FixYa!

Sincerely,

JC

Bad intake gasket will cause this