BMW X3 E83 2.0d loses power
Why does the BMW X3 E83 2.0d lose power and torque from time to time?
The cause may be a clogged particulate filter, caused by faulty thermostats. If the engine temperature does not rise above about 75 degrees, the filter does not regenerate, meaning it does not burn off the soot. Also check the back pressure sensor.
Which fault codes are related to power loss on the X3 E83 2.0d?
Codes 00480A and 00481A pointed to the particulate filter system, and 004011 and 0041BB to the back pressure sensor. Code P1252 corresponds to BMW code 4191, a short circuit to ground in the boost pressure regulator. According to the manufacturer, the boost pressure actuator cannot be replaced on its own.
What can cause a boost pressure fault or turbo whistle on the X3 E83 2.0d?
The air intake pipe seal going to the turbo may be poorly seated and cause whistling and a boost pressure leak. Check the hoses and seals and the play in the turbo shaft. A worn alternator has been suspected of disturbing boost pressure control.