Sensor ambient pressure Dtc P2272
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From: New Jersey
‘16 Mercedes GLE450 amg,’15 Mercedes gla, coupe,’07 Mercedes w221,’12 Audi A
Sensor ambient pressure Dtc P2272
Hello, I am contacting you regarding your post, as I am experiencing a problem with my Mercedes w221, which is producing the p2272 code for Mercedes Ambient pressure in control module motor. Despite recent installations of a new manifold air intake, throttle body, and a Bosch Pressure Sensor, the check engine light continues to be displayed. It is worth noting that the light did not reappear for an entire day following the sensor installation, but has since reappeared. Dtc#2272
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S500
This P2272 trouble code refers to the post-catalytic converter O2 (oxygen) sensor - allegedly Bank 2
This post-cat sensor is used for monitoring the efficiency of the catalytic converter.
When the signal from the O2 sensor is detected by the PCM as being stuck lean or biased lean, this DTC is set.
The causes for this DTC may include:
Exhaust leak near O2 sensor
Contaminated or failed HO2S2 (Sensor 2)
HO2S2 wiring/circuit problem
Loose installation of HO2S2
Fuel pressure incorrect
Faulty fuel injector
Engine coolant leak
Faulty purge solenoid valve
PCM has failed
This post-cat sensor is used for monitoring the efficiency of the catalytic converter.
When the signal from the O2 sensor is detected by the PCM as being stuck lean or biased lean, this DTC is set.
The causes for this DTC may include:
Exhaust leak near O2 sensor
Contaminated or failed HO2S2 (Sensor 2)
HO2S2 wiring/circuit problem
Loose installation of HO2S2
Fuel pressure incorrect
Faulty fuel injector
Engine coolant leak
Faulty purge solenoid valve
PCM has failed
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S500
that’s not so much fun - they list in the site I use lots of muddle ups - they also manage to use different stuff for different mkts -
why make a simple, reliable easy to service and maintain car with lots of parts commonality - when you can destroy the planet, **** off customers with breakdowns and headaches and make life difficult, where an incompetent accountant tells you he can cheat society out of necessary taxes and pretend to save the corporation 10 pence vs doing it correctly.... meanwhile he recruits another 65 junior accountants to try and hide his errors, and the marketing budget needs to be doubled to hide the collapsing brand image.... NOPE - its so he and the other corrupt morons wrecking the country can go around the world on Jollies to ensure all the corporations have the very same world ending agenda....
part 360 ?
https://nemigaparts.com/cat_spares/e...71/63w/49/212/
why make a simple, reliable easy to service and maintain car with lots of parts commonality - when you can destroy the planet, **** off customers with breakdowns and headaches and make life difficult, where an incompetent accountant tells you he can cheat society out of necessary taxes and pretend to save the corporation 10 pence vs doing it correctly.... meanwhile he recruits another 65 junior accountants to try and hide his errors, and the marketing budget needs to be doubled to hide the collapsing brand image.... NOPE - its so he and the other corrupt morons wrecking the country can go around the world on Jollies to ensure all the corporations have the very same world ending agenda....
part 360 ?
https://nemigaparts.com/cat_spares/e...71/63w/49/212/
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S500
....the correct parts are plug and play - if they unscrew (can be very tight and some hard to reach) you fit the new ones, tighten up till its crush washer is properly snug in the correct holes and connect the wires
if everything else is correct - then the car should carry on likely in the background tweaking its long term trim a smidge as the new sensors provide better info
if its been running like a dog (with a duff sensor) - resetting the adaptions might be a good idea - but my experience suggests Merc play dirty tricks and it might make things worse
if everything else is correct - then the car should carry on likely in the background tweaking its long term trim a smidge as the new sensors provide better info
if its been running like a dog (with a duff sensor) - resetting the adaptions might be a good idea - but my experience suggests Merc play dirty tricks and it might make things worse
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S500
.... depends - I've not tried but I suspect there's quite bit of room from below... the turbo cars I think become a nightmare - these might be quicker, so less than 2 hrs..... might be 30 mins a side for an expert
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From: Iowa
2008 CL550, 2022 EQB 300, 2023 EQS 450 4Matic
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From: Baltimore County, MD
'13 s212 63 p30. '06 LX470
Use or rent the proper tool to make it easier if they are somewhat seized. You want a wrench that contacts all sides of the sensors. This is not so much of an issue when you can cut the wire to remove the O2 sensors, but it is important for properly tightening them or removing and reinstalling the same sensor. Similar to a line or brake wrench, the o2 socket allows pass through of the wire. If they are actually seized, come back for more help. Like mentioned above it’s easy enough to just go under, find the sensor, unplug it, then unscrew the sensor. Then replace in reverse.
and in case this is your first time, the location of the sensors would be on each exhaust bank, one before the cat, and one after the cat.
and in case this is your first time, the location of the sensors would be on each exhaust bank, one before the cat, and one after the cat.
Last edited by Baltistyle; Mar 18, 2025 at 09:48 AM.
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Joined: Jun 2012
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From: New Jersey
‘16 Mercedes GLE450 amg,’15 Mercedes gla, coupe,’07 Mercedes w221,’12 Audi A
I am seeking advice on safely accessing the underside of my vehicle without a lift. Did you utilize ramps or jackstands? I am also considering applying PB Blaster to loosen the components prior to removal. Additionally, what tools did you employ besides the O2 sensor socket?
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From: Baltimore County, MD
'13 s212 63 p30. '06 LX470
Second, did you use Some sort of lube like pb blaster to loosen the rust?
Third is to use heat, and either atf/acetone mix or go old school and use a crayon or candle wax. The wax does not vaporize like solvents do.
Lastly, make sure the wrench you use is long. With the heat and wax you should be good. Get it VERY hot. DO NOT crank on the threads without the heat and lube to make sure you dont ruin the exhaust.
Once on an old dodge truck, I was laying there on the ground thinking I was going to have to take it in because it was so stuck. The proper tool, heat and leverage got it right out after lots of previous struggle.
