One of my Neons (96 Highline)has thrown me some codes. 32, 37, and 21.

21 - 02s sensor problem (oxygen sensor), upstream or down stream

32 - EGR system failure

37 - Torque converter clutch solenoid CKT or park/neutral switch failure

My questions are:

How do you tell, (if you can) which O2 sensor is bad. And.......How do you tellwhich of thethe torque converter clutch solenoid or the neutral switch failed. And could the EGR system failure code be from theO2 sensor problem? I am pretty sure one of the O2 sensors is bad because I can smell gas and the carskeeps trying to die.

 

I would just swap out the o2 sensor there only like 20 bucks on ebay.

 

i would get an OBD2 code reader and that will narrow down ur codes alot.

 

Ok.......thanks for the responses. I have decided to just change everything. It doesn't cost that much and it will provide piece of mind.

 

Most likely it's your upstream O2 sensor.

 

Its most likely the uspstream, but you can go to an autozone or advance and they can tell you right away.