e550 m278 engine error code
Thread Starter
Junior Member
Joined: Feb 2014
Posts: 48
Likes: 3
From: CANADA
2012 E550 4Matic
e550 m278 engine error code
I recently purchased 2012 E550 with only 30k miles. I got 2 engine code came out just today.
p228097 the air mass flow in the intake air system (cylinder bank 1) has a malfunction. system function is restricted
p222B84 Pressure sensor 2 has a malfunction. There is a signal below the permissible limit value
What do they mean and is it something that I can fix? I did not feel any power loss etc. I really do not want to take it to a mechanic as they really ask an arm and leg in Canada
I appreciate any help.
p228097 the air mass flow in the intake air system (cylinder bank 1) has a malfunction. system function is restricted
p222B84 Pressure sensor 2 has a malfunction. There is a signal below the permissible limit value
What do they mean and is it something that I can fix? I did not feel any power loss etc. I really do not want to take it to a mechanic as they really ask an arm and leg in Canada
I appreciate any help.
Thread Starter
Junior Member
Joined: Feb 2014
Posts: 48
Likes: 3
From: CANADA
2012 E550 4Matic
Thread Starter
Junior Member
Joined: Feb 2014
Posts: 48
Likes: 3
From: CANADA
2012 E550 4Matic
I had removed two camshaft sensors to see if they have new version (having green seal) and installed back. I got the codes 2 days after I did this. Cables, connectors look okay.
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Joined: Sep 2018
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10-second E550
No problem. It's an easy DIY if that is indeed the problem. The reason I think that may be it: those sensors' outputs are compared to the post-turbo MAP sensors to give the computer a pressure ratio for calculating mass flow. When a sensor goes bad, the 2 sides read differently and you get a code.
One of your error codes refers to bank 1 (passenger side) and the other to sensor 2. I'm not sure if sensor 2 would be on bank 2, but it may be worth replacing both anyway.
One of your error codes refers to bank 1 (passenger side) and the other to sensor 2. I'm not sure if sensor 2 would be on bank 2, but it may be worth replacing both anyway.
Thread Starter
Junior Member
Joined: Feb 2014
Posts: 48
Likes: 3
From: CANADA
2012 E550 4Matic
No problem. It's an easy DIY if that is indeed the problem. The reason I think that may be it: those sensors' outputs are compared to the post-turbo MAP sensors to give the computer a pressure ratio for calculating mass flow. When a sensor goes bad, the 2 sides read differently and you get a code.
One of your error codes refers to bank 1 (passenger side) and the other to sensor 2. I'm not sure if sensor 2 would be on bank 2, but it may be worth replacing both anyway.
One of your error codes refers to bank 1 (passenger side) and the other to sensor 2. I'm not sure if sensor 2 would be on bank 2, but it may be worth replacing both anyway.
Isin't that early for sensors to get fail as car has only 30k miles.
