Error Codes 14 & 21
 

Hello guys, i am getting error codes 14 and 21 when i do the diagnosis, i read what they meant, but having a hard time understanding the problem to fix.
Mr nickeleye had replied to my last posting saying "intake" but unfortunately i am still not competant enough about engine performance as i would like to be to understand what to fix, any info helps guys, thanks.

hey you guys, doing some work finally on my car in the next couple days, and any info will help. Thanks.

21 is your Oxygen sensor. Replace it.

14 is your igniter. You can check it with a multimeter, but it probably is bad if its throwing a code.

Good luck.

thanks man, i have a multimeter so i will check that tomorrow. And the o2 sensor huh. i guess i'll have to pick one of them up.

hey guys im speaking with a live rep on a parts site and she wants to know if i want front of cat O2 sensor or what? i really dont know. im assuming front of cat.. any info?

i found a diagram in the TSRM which labels the O2 sensor in front of the (TWC) three way catalyst. Does that mean front of cat.. hmm.

The O2 sensor is in front of the cat. And I have a code 14 right now. I'm going to check the ignitor and the coil pack tomorrow to see which is bad.

A couple of helpful links....

How to check ignition coil
How to check ignitor

Only 1988 and later California models have a sub-oxygen sensor. And even if you did have one and it was throwing a code, it would be code 27.

The O2 you want is in front of the cat. The one that you don't have unless yours is an 88 cali model, the sub O2 sensor, is AFTER the cat.

thanks, so before cat is what i figured but the online help kinda threw that one at me, and let me know how your code 14 goes, thanks.

so i replaced my O2 sensor let it run for a bit then tested again, still getting error codes, so i disconected battery terminals then reconnected, did diagnosis and got all blinks... so both codes went away after i did the reset...