I've had a persistent (in other words, I've done nothing about it) DTC 21 for some time, and today I finally decided to do something about it.
I pulled the right side (outer) sensor connection apart, cleaned it and tested the sensor. It's supposed to have between 5.0– and 6.5–ohms at 68°F. Mine had, well my DMM didn't see anything, so I guess nothing. Or infinite. Or something like that.
Anyway, I pulled the EFI Main fuse and went around cleaning various dirty needful items in the engine compartment, while I waited for the capacitor(s) to drain. I reinstalled the fuse after a goodly amount of time, inserted my handy–dandy check wire into the DLC1 connector and turned the key on. The MIL flashed "2" and "1", so I was confused. And am.
Now, to be fair, I haven't run through the entire road test procedure to check that the circuit is capable of checking itself (see page EG-226, if you're following along at home), but I expected that the error would be cleared and that I'd need to run the "two–trip" test to get it back on, since I am pretty certain the sensor is dead.
Any thoughts from the group as to why the code wouldn't clear?
Also, in an unrelated, or maybe it is related, thought, given the recent crop of previously unavailable parts, I thought I'd check to see if there was a substitute for the long gone 2nd generation O2 sensor (89465-69065). I was hoping against hope that I wouldn't have to install the 3rd generation O2 sensor and repin a new 3rd generation connector housing onto my 2nd generation harness.
Sure enough, 89465-69115 pops up and claims to be a replacement, at least for the right hand side sensor. Thought I'd add that tidbit to the mix.
I pulled the right side (outer) sensor connection apart, cleaned it and tested the sensor. It's supposed to have between 5.0– and 6.5–ohms at 68°F. Mine had, well my DMM didn't see anything, so I guess nothing. Or infinite. Or something like that.
Anyway, I pulled the EFI Main fuse and went around cleaning various dirty needful items in the engine compartment, while I waited for the capacitor(s) to drain. I reinstalled the fuse after a goodly amount of time, inserted my handy–dandy check wire into the DLC1 connector and turned the key on. The MIL flashed "2" and "1", so I was confused. And am.
Now, to be fair, I haven't run through the entire road test procedure to check that the circuit is capable of checking itself (see page EG-226, if you're following along at home), but I expected that the error would be cleared and that I'd need to run the "two–trip" test to get it back on, since I am pretty certain the sensor is dead.
Any thoughts from the group as to why the code wouldn't clear?
Also, in an unrelated, or maybe it is related, thought, given the recent crop of previously unavailable parts, I thought I'd check to see if there was a substitute for the long gone 2nd generation O2 sensor (89465-69065). I was hoping against hope that I wouldn't have to install the 3rd generation O2 sensor and repin a new 3rd generation connector housing onto my 2nd generation harness.
Sure enough, 89465-69115 pops up and claims to be a replacement, at least for the right hand side sensor. Thought I'd add that tidbit to the mix.
