Check Engine Light(OBDII)

Ya so my check engine light a few days ago, I went into a local shop and they wanted $70 to “hook it up and find out what was wrong”. Anyone know a good place to go that will be straight with me. I just want to find out which sensor is throwing a code, and will replace it myself.

Info:
99 Sentra
I live in Tonawanda

Can’t you goto autozone and use one of theres?

I have a scan tool … ill do it for free

autozone does it for free

o rly, i did not know that, I will swing by an autozone then, thanks a ton guys

I have a Scan-Tool also, PM if the AutoZone retards can’t help you.

I actually got 2 errors, P0325 (knock sensor) and P0138 (02 Sensor) bank 1 sensor 2( cat sensor)

heh, i just passed inspection a few weeks ago, i will replace them next weekend anyways,

anyone know of any decent sites to buy them off of?

www.RockAuto.com

good luck getting the O2 out … and what are the codes ??? Low voltage ?? …

I will still let ya use my scan tool to read live data …

the readout says the input voltage from the O2 sensor is too high and the knock sensor one states a malfunction exists in the electrical circuit

When i replaced the header to cat for rusty reasons, I took the cat O2 out as well, it was not too bad, and next weekend I will be down there anyways replacing the cat-back portion.

the codes are above, P0325 and P0138. Thanks for the offer though

canister?

[quote=“my240nissan,post:11,topic:35399"”]

canister?

[/quote]

He already said what the codes were