W124, M104 DM Code 6 and 17; need help - PeachParts Mercedes-Benz Forum

mercron · #1 06-01-2017, 12:48 PM

That goes to the diagnostic module pressure sensor (B5/2 in the diagram above). That device tells the ECM the intake vacuum or pressure in order to set lambda at idle in case your MAF fails. The sensor in my car is next to the ABS and Purge Valve (MOT) and is bolted to the driver side front wheel well. You should connect it with a vacuum hose. That might be the reason you got code 17.

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Stevester 500E · #2 06-01-2017, 04:40 PM

The nipple next to the one circled in red is connected to the B5/2.
So B5/2 is connected.
I am trying to figure out where the circled red nipple goes to. The diagram doesn't show. I have the M104.99x with no EZL.

Quote:

Originally Posted by mercron

That goes to the diagnostic module pressure sensor (B5/2 in the diagram above). That device tells the ECM the intake vacuum or pressure in order to set lambda at idle in case your MAF fails. The sensor in my car is next to the ABS and Purge Valve (MOT) and is bolted to the driver side front wheel well. You should connect it with a vacuum hose. That might be the reason you got code 17.

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