xr8d_xj
NAXJA Forum User
- Location
- Colorado Springs, CO
This morning as I drove into work my check engine light came on. Ya know that feeling ya get when it comes on? It's not like it's gonna tell you that you have cancer or anything; but I still hate that feeling...
Before I walked into the office I did the key-turn-3-times-to-get-the-codes thingy and got the following codes:
12 - yep, got it
21 - O2 sensor or wiring faulty
21 - Why?! Two times... what does it mean?!
55 - yep, got it
BTW... '97 XJ, 4.0L, auto; Since I replaced the sensor I've only been driving the XJ for the past two weeks (less than 100 mi).
A couple months ago I replaced the oxygen sensor the LAST time it gave me a code 21. The guy at the counter asked if I wanted to replace both oxygen sensors. I only replaced the front (down pipe) oxygen sensor, but the not the cat's sensor. Heck, is that an oxygen sensor too and should I have replaced them both? Because this 2x code 21 has me scratching my head. Thanks!
Before I walked into the office I did the key-turn-3-times-to-get-the-codes thingy and got the following codes:
12 - yep, got it
21 - O2 sensor or wiring faulty
21 - Why?! Two times... what does it mean?!
55 - yep, got it
BTW... '97 XJ, 4.0L, auto; Since I replaced the sensor I've only been driving the XJ for the past two weeks (less than 100 mi).
A couple months ago I replaced the oxygen sensor the LAST time it gave me a code 21. The guy at the counter asked if I wanted to replace both oxygen sensors. I only replaced the front (down pipe) oxygen sensor, but the not the cat's sensor. Heck, is that an oxygen sensor too and should I have replaced them both? Because this 2x code 21 has me scratching my head. Thanks!