1991 240 giving me new check engine light codes, 241 and 121

  • Thread starter Thread starter arekaye
  • Start date Start date
A

arekaye

Hey all, I've had the EGR light come on before and ended up getting a
new O2 sensor and the problem went away with that code, but I was
wondering if there are any other easier ways? I've heard of cleaning
out the EGR valve but I have no idea what that is or where for that
matter. I'm not sure what the 121 means but from what I've read it's:

1-2-1*


Faulty signal to/from Air Mass Meter


Wiring fault to or in AMM

NO idea what this part is but any help appreciated, thanks
 
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