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Ecu code 21

C
Jul 27, 2009
18
1
3
Thanks for the replies,if it is a knock sensor failure,what is the cause of the failure,is it snow coming in through the side vents and down the air intake and into the throttle bodies and mixing in with the fuel ? If so,what can be done to prevent this from happening again, and is it harmful to the engine if it keeps on occurring ?
 
S
Mar 13, 2010
15
2
3
West Fargo ND
ecu 21 code, knock sensor

My 08 M8 has been setting a code 21 all the time this year... Found out this info today. Check for a white dot on your ecu, if it has it, recall has been done. Mine has orange dot, so looks like i will be getting a new ecu and no more 21 code! :pop2:


"Cat has just released .a recall on the 08 f800,m800, and crossfire800. they are recalling the ecu if you you have a unit with the vin # between 4uf08snw98t111005 through 4uf08snw98t116379 contact your dealer. they will be replacing the ecu free of charge."
 
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