How to get engine codes

raggmopp · Post by **raggmopp** » 27 Mar 2012, 15:15

Hi all:

Got a 2002 S80 T6, had it for just a couple of months and it now has 109500 miles.
The wife put 85 Octane without knowing. Now the check engine light is on.

So, how can I get the codes to know what the check engine light means?

And how can I reset the check engine. I saw another post on this forum about pulling a fuse and/or disconnect the battery.
What about the radio? Does the radio need to be reprogrammed? And what else may need to be reprogrammed?

Many thanks!

Post by **fazool** » 27 Mar 2012, 19:59

The codes are stored in flash non-volatile memory and removing power will not clear them. You need to use a compatible scanner to connect to the diagnostic port.

Those radios connect over a network and identify themselves to the CEM. They do not need to be unlocked or reprogrammed.

Where did you buy 85 octane. I've been driving for 30+ years and never seen 85 octane.

raggmopp · Post by **raggmopp** » 29 Mar 2012, 22:45

We live in CO. WY & NM also have 85 octance, most areas it is 87, 89, 92 octane ratings. In Denver it is 85, 87 & 91.

Thanks fazool