Code 71 + Code 21

[Von Hayek]

Hey Guys,

My dad recently had a nice tucked, stainless exhaust installed on his '94 FZJ80 and it is throwing both of the above codes at him. Both O2 sensors were replaced.

Do you guys think that these are two separate problems or related? I can't see how they might be related, but it seems an odd coincidence that they appear simultaneously.

As always, thanks for the help.

 

[KrowaFJ80]

I have the same issue. Did you fix this problem?

 

[Michael Hanson]

Hi, What kind of O2 sensors were used ? Only use Denso or Toyota. Mike

 

[KrowaFJ80]

Hi, What kind of O2 sensors were used ? Only use Denso or Toyota. Mike

Hey Mike, I put 2 NTK 24044.