check engine light on (p0136)

[slomofo]

Ok so I threw code p0136 says 02 malfunction so searching the site found out that there's 2 o2 sensors one before and after the cat ..some people say just change the one before the cat and ill be good any suggestions? And were can I get one some what cheap autozone wants 60 plus tax for a bosch and 100 plus tax for a denso I believe ..any certain brands I should. Look for ? Thanx to all

[evil-G-nius]

Denso is the OEM....I think thats why its so expensive. But those prices are about standard actually. I too am wondering about wether or not I should change both O2 sensors or just the pre-cat sensor. The pre-cat is really the one that does the lion share of the emissions work so I would think that it is ok just to change that one...plus its the easiest to reach. Be sure to get one with the connector already on it. O2 sensors are not something that you should be splicing wires with. Some people do it and you can get it to work, but it will be a more accurate read of whats going on with the plug in tact.

[mko]

P0136 Heated Oxygen Sensor circuit Bank 1 Sensor.

this is pre-cat o2 sensor

[bronxbombr]

i sell O2 snesors brand new so holla if interested

[slomofo]

Thanx guys I'm just going to replace the pre cat o2 and see if the light goes off and bronxbombr I pm'd u

[Galanttuner10]

bosch is stock actually on both my 95 and 96. i will say autozone wanted like 60 bucks and advanced wanted like 85.

is your car a cali car or fed spec car?

[mko]

Thanx guys I'm just going to replace the pre cat o2 and see if the light goes off and bronxbombr I pm'd u

the light wont go off on its own. you actually have to erase the code