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W164 exhaust presure Sensor
12-11-2017, 12:55 PM
Post: #1
Mercedes Benz W164 exhaust presure Sensor
Hello ! I have a Problem with my w164 280cdi! Sometimes when I cold Start Mil Light comes and engine is shaking! Error Code is exhaust pressure Sensor Pressure to high! Turbo and outlet mufflers are new! Pressure Sensor is also New! Exhaust pressure is when engine is Not running at 4380hpa when running 4390 hpa! Cables are good!
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12-11-2017, 02:23 PM
Post: #2
RE: W164 exhaust presure Sensor
Take a look at my thread, there's lots of info there:
http://mhhauto.com/Thread-W164-320-CDI-k...ure-sensor

Hit 'Thanks' and '+Rep' if I helped plzFing32
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 Thanks given by: Rocinante
12-11-2017, 10:21 PM
Post: #3
RE: W164 exhaust presure Sensor
Hello

such trouble are from two different reason:
1.can be from internal barometric sensor from ecu
2.can be from air quality sensor( left side air filter housing ) also this one are the second barometric sensor

to find which one are damage you have to do a small trick:
1.start engine and disconnect air quality sensor,barometric pressure must be 1020mBar and your car must have a good responce on test drive
2.start engine and disconnect back pressure sensor and the value must be 1920-1980 mBar ( depend of sw version)

In both cases the value can be "set" in file for a standard value and no more trouble if that vehicle are somewhere 20-30 meters above the sea level!
But if the owner must go with his car in the mount area at 1800-2000m above sea level that car will have a slow responce becouse barometic pressure will be under 980mBar and the differences should not be lower/higer than 50 mBar !

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 Thanks given by: KriyenKPp , JarsaR , kodi366
12-12-2017, 02:51 AM
Post: #4
RE: W164 exhaust presure Sensor
(12-11-2017 10:21 PM)mike_service Wrote:  Hello

such trouble are from two different reason:
1.can be from internal barometric sensor from ecu
2.can be from air quality sensor( left side air filter housing ) also this one are the second barometric sensor

to find which one are damage you have to do a small trick:
1.start engine and disconnect air quality sensor,barometric pressure must be 1020mBar and your car must have a good responce on test drive
2.start engine and disconnect back pressure sensor and the value must be 1920-1980 mBar ( depend of sw version)

In both cases the value can be "set" in file for a standard value and no more trouble if that vehicle are somewhere 20-30 meters above the sea level!
But if the owner must go with his car in the mount area at 1800-2000m above sea level that car will have a slow responce becouse barometic pressure will be under 980mBar and the differences should not be lower/higer than 50 mBar !

So i let the Sensors disconnected? And only adjust with diagnosis or with ecu Software? Thank you
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12-12-2017, 03:32 AM
Post: #5
RE: W164 exhaust presure Sensor
Only with edited software/file ! also sensor can be connected !

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Custom ENG/GER OLS file for TUNE/DPF/SCR/EGR/TVA/VSA/DTC and more...
www.quick-tuning..com
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01-14-2018, 11:44 PM
Post: #6
RE: W164 exhaust presure Sensor
hi, run control driven turbo compressor, excessive turbo pressure compressor the car presents problem on back pressure sensor.
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