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2009 Mazda trouble code

Spyder

Well-known member
Joined
Nov 3, 2004
Messages
1,136
Location
Des Moines, Iowa
I know its a mazda but I figured someone here might know...

Check engine light came on, scanned with OBD2 and CAN scanner. Code listed: CO121

Does any one have an idea? What little information I can find is Electronic Brake Control Module.

THanks.
 

ktmrider

Well-known member
Joined
Sep 10, 2007
Messages
3,128
Location
Tempe, AZ
^^ Note it's a "C" code, not "P", ie Chassis related.

Gotta love CANBus, very difficult to pull those codes on older vehicles.
 

Spyder

Well-known member
Joined
Nov 3, 2004
Messages
1,136
Location
Des Moines, Iowa
I guess so. I called the local Mazda dealer and they said there isn't any such code in the Mazda database.
 
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