CEL Code 12 on my '93 190e 2.3 - Page 2 - PeachParts Mercedes-Benz Forum

slk230red · #16 01-22-2009, 10:59 AM

Quote:

Originally Posted by Arthur Dalton

Sensor is wired to ECu ..but shold have a vac line going to it.

Little 1' square sensor with a 3 wire plug and a vac line.. Not sure of exact location on 201, but it is on the left /inner fender well on 124.

Post if you find it.........or if you have that CD

Are you referring to the Ignition Control Module on the driver's side fender well that has 2 four pin connectors, CPS connector, and 1 vacuum line?

Arthur Dalton · #17 01-22-2009, 11:05 AM

probably... I don't have that CD , but there has to be a vac line going to an Engine management module. That would be where to look b/c he is not getting Absolute Pressure from manifold communication...so the suspect would be a leaking vac line from the intake to whichever module monitors that vacuum signal. On 124, it would be the DM-N/59...I do not know where they get it on 201, but it has to be one of them. So, check all vac lines coming off intake, and specially one that goes to a module or vac sensor.

slk230red · #18 01-22-2009, 11:35 AM

Quote:

Originally Posted by Arthur Dalton

probably... I don't have that CD , but there has to be a vac line going to an Engine management module. That would be where to look b/c he is not getting Absolute Pressure from manifold communication...so the suspect would be a leaking vac line from the intake to whichever module monitors that vacuum signal. On 124, it would be the DM-N/59...I do not know where they get it on 201, but it has to be one of them. So, check all vac lines coming off intake, and specially one that goes to a module or vac sensor.

I think the ICM monitors the vacuum. Here's a photo, not my car but a good reference. You can see the L shaped vacuum line on the left side. I do know that if you unplug the vacuum line going to the ICM, the engine will still run but the RPM's drop.