Hi,

I did the research on code 19 and know about the chip that Jim has. My questions is that I recently replaced the pipes going to and from the check valve on top of the air pump.

Could this cause me to get code 19?

Also when the check engine light came on I read the codes from the push button first and got code 4 and code 19. Then I read the codes at pin 4 got back a 1, pin 6 got back a 1, pin 7 got back a 6, and pin 19 got nothing.

Is this normal for pin 19? I thought I should have gotten something.

What causes code 6 at pin 7? I keep getting this code on that pin.

Is there an easier way to clear the codes on all the modules at once?

Thank you.

Code 6 on EA/CC/ISC is NSS switch contacts on that chassis.

You are not getting any codes on 19 b/c that is DM and DM will not report back any info until the car has done ALL emmissions self-test. That is N/59 Emmissions module and is the same as P/Button that you cleared the codes for CE with.

Code 19 coupled with 4 from DM would be b/c of vac leak from AIR system.

__________________
A Dalton

The answer to your code 19 and reset question comes with the use of a proper tool. Code 19 is an adaptation code so the obvious answer is to know what your adaptations are! Code 19 occurs when the adaptaions are used up. There are two separate forms of adaptations and the ones that are used up will tell the story. The chip doesn't change anything it just opens up a larger range of adaptation, so larger correctiona can be made by the controller.

A proper tool will clear all codes at once.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

I reset all codes and checked the AIR system for leaks. The system is not leaking out of the pipes around the pump. I want to check the small vacuum lines but dont know how to.

Is there a good tool that I can buy?

After reseting the codes only code 19 keeps coming back. Code 4 no longer comes back.

4wheeling, checkout my main web page about halfway down for info on the 'dreaded' DTC#19 problem.

In any regard you can fix it cheaply. . .

__________________
Regards . . . . JimF
-------------------
'94 S500 Cpe

Visit my Mercedes Web Page

The dreaded code 4 returned. I will check the fuel pressure and the vac lines and report back. Any chance the valve that is by the pump and the one by the washer fluid is bad? If so how do I diagnose them?

Thanks.