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S/CL-Class (W140) Coupe 1994-1999: S500 Coupe, S600 Coupe, CL500 Coupe, CL600 Coupe

Removed cats now CEL

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Old Aug 20, 2008 | 02:50 PM
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SilverCL600
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From: SoFla
2004 e55 AMG
Removed cats now CEL
How much resistance do I need to give the ecu harness for the rear o2 sensors to keep the ecu happy?

European 1997 S/CL600 6.0l V12

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Old Aug 23, 2008 | 09:18 PM
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E55 PWR's Avatar
E55 PWR
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e55
just get some O2 similuators, they are cheap and easy to intall. Like $140 for the set or something.
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Old Aug 24, 2008 | 01:36 AM
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whoover
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'19 E63S sedan
A resistive load will only simulate the heater. The O2 signal steps above and below .5V every 3 seconds or so. You need to provide both to the ECU to avoid the CEL. That's why they sell simulators.

Or you can build one:

http://www.mkiv.com/techarticles/oxy...tor/index.html
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Old Aug 26, 2008 | 11:12 AM
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SilverCL600
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2004 e55 AMG
Thanks for the helpful website! I will build a couple
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Old Aug 26, 2008 | 12:43 PM
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2010 C63
o2 spacers work very well in many applications as well.

Mike
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