[W126 Coupe] was wondering if anyone knew what a code 21 is on our car 88 560 sec

[Dick Spellman]

Gary wrote:

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Ehh.  Sorry Gary.  Just read the chart in my previous post and determine 
if you are seeing the code 2 repeated on the diag terminal led or if 
perhaps you are seeing code 12.  Ignore my previous reference to egr 
temp and jut read the chart.

For what it's worth code 22 does is not referenced until model years 
1990 and up and refers to illogical heating current on the O2 sensor.

Also, I'm pretty sure I uploaded the entire manual some time ago to 
Steve Nervig's web site where you can view and download the entire manual.

Dick
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