[Q] Peake Research R5/fcx Codes

["Ron Buchalski" <rbuchals@xxxxxxxxxxx>]

All,

I borrowed a Peake Research R5/fcx (code reader) tool to find out why a 
co-worker's 1997 528i had the CE light on.  The following codes were 
displayed:

E9
EA
dd
dc

The 528i codes are listed in Chart 2 of the Peake Research manual.  
According to the chart, E9 and EA are 'Catalyst Efficiency below threshold' 
for Cyl #1-3 and Cyl #4-6, respectively.

The dd and dc codes aren't listed in Chart 2.

However, in Chart 3, dc and dd are listed as 'AfterCat oxy sensor slow 
response time' for Cyl #1-3 and Cyl #4-6, respectively.

So, assuming that the dc and dd code information listed in Chart 3 is 
applicable for the 1997 528i, it seems to indicate that post-cat O2 sensors 
may need to be replaced.

The car has 92k miles on it.

Any comments, suggestions, tips?

Thanks,

- -rb

PS: This tool is REALLY cool!  It checks codes, resets the CE light, resets 
the Oil Service light, and resets the Inspection light.


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