check engine light is on

[yoyo]

120k 2002 manual . Went to buy ipad this morning and the engine light was on.

Went to autozone and checked the code:

heated oxygen sensor ho2s (RF) circuit low input
probable cause
1. lean air/fuel ratio
2. open or short circuit condition
3. faulty heated oxygen sensor ho2s

The autozone staff told me to buy some liquid cleaner to clean the engine. I don't think that will work. Should I go to firestone or the dealer or just call my friend who has a home business car care garage?
Thanks.

 

[JReichle1]

Circut low input usually means the o2 sensor is bad. Get a direct fit replacement.

 

[oem plus]

Just replaced mine 2 weeks ago. 121,000 miles. I got the OE smartlink universal kit. Part #15733. A little less than the OEM replacement. Took about 20-30 min to do. Here is a link........BTW, the check engine light did not go off until the next day.

https://www.rockauto.com/catalog/x,carcode,1416833,parttype,5132

 

[Sandawgk5]

How do you know which sensor is bad. Don't our cars have a one on the manifold and one after the cat?

Dik

 

[oem plus]

The code reader at Autozone told me it was the 1st one.

 

[Sandawgk5]

Oh that makes sense then. My engine light came on right around the same mileage but autozone around here nor Kragen or OReilleys will read codes anymore.

Dik

 

[hornsfan10609]

I got the same code shortly after seafoaming my engine, I got the Bosch universal O2 sensor for around 60 and it has worked fine since. It's easier than it sounds to wire it in.

 

[JReichle1]

Oh that makes sense then. My engine light came on right around the same mileage but autozone around here nor Kragen or OReilleys will read codes anymore.

Dik

For some reason in California Autozone dosent pull codes anymore. Something to do with the dealers not wanting easy access to free diagnostics. Every other state Autozone pulls codes for free... Not sure about Hawaii or alaska?