# Check Engine Light(OBDII) **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [September 15, 2007, 7:32am UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399 "2007-09-15T07:32:14Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![JCuz](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jcuz/32/7338_2.png) [@JCuz](https://forums.speedlife.net/u/JCuz)\ **Post date:** [September 15, 2007, 7:32am UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/1 "2007-09-15T07:32:14Z")
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 ---
**Author:** ![articzap](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/articzap/32/7361_2.png) [@articzap](https://forums.speedlife.net/u/articzap)\ **Post date:** [September 15, 2007, 7:40am UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/2 "2007-09-15T07:40:18Z")
Can’t you goto autozone and use one of theres? ---
**Author:** ![BDR5oh](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bdr5oh/32/7315_2.png) [@BDR5oh](https://forums.speedlife.net/u/BDR5oh)\ **Post date:** [September 15, 2007, 7:42am UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/3 "2007-09-15T07:42:46Z")
I have a scan tool … ill do it for free ---
**Author:** ![2TurboZ](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/2turboz/32/7577_2.png) [@2TurboZ](https://forums.speedlife.net/u/2TurboZ)\ **Post date:** [September 15, 2007, 7:52am UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/4 "2007-09-15T07:52:01Z")
autozone does it for free ---
**Author:** ![JCuz](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jcuz/32/7338_2.png) [@JCuz](https://forums.speedlife.net/u/JCuz)\ **Post date:** [September 15, 2007, 10:31am UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/5 "2007-09-15T10:31:27Z")
o rly, i did not know that, I will swing by an autozone then, thanks a ton guys ---
**Author:** ![Justin](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/justin/32/7459_2.png) [@Justin](https://forums.speedlife.net/u/Justin)\ **Post date:** [September 15, 2007, 11:50am UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/6 "2007-09-15T11:50:21Z")
I have a Scan-Tool also, PM if the AutoZone retards can’t help you. ---
**Author:** ![JCuz](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jcuz/32/7338_2.png) [@JCuz](https://forums.speedlife.net/u/JCuz)\ **Post date:** [September 15, 2007, 2:53pm UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/7 "2007-09-15T14:53:35Z")
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? ---
**Author:** ![Justin](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/justin/32/7459_2.png) [@Justin](https://forums.speedlife.net/u/Justin)\ **Post date:** [September 15, 2007, 2:59pm UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/8 "2007-09-15T14:59:20Z")
[www.RockAuto.com](http://www.RockAuto.com) ---
**Author:** ![BDR5oh](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bdr5oh/32/7315_2.png) [@BDR5oh](https://forums.speedlife.net/u/BDR5oh)\ **Post date:** [September 15, 2007, 2:59pm UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/9 "2007-09-15T14:59:35Z")
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 … ---
**Author:** ![JCuz](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jcuz/32/7338_2.png) [@JCuz](https://forums.speedlife.net/u/JCuz)\ **Post date:** [September 16, 2007, 5:37am UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/10 "2007-09-16T05:37:50Z")
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 ---
**Author:** ![my240nissan](https://avatars.discourse-cdn.com/v4/letter/m/e19b73/32.png) [@my240nissan](https://forums.speedlife.net/u/my240nissan)\ **Post date:** [September 16, 2007, 1:13pm UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/11 "2007-09-16T13:13:03Z")
canister? ---
**Author:** ![eMKay](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/emkay/32/7428_2.png) [@eMKay](https://forums.speedlife.net/u/eMKay)\ **Post date:** [September 16, 2007, 6:20pm UTC](https://forums.speedlife.net/t/check-engine-light-obdii/35399/12 "2007-09-16T18:20:39Z")
[quote=“my240nissan,post:11,topic:35399"”] canister? [/quote] He already said what the codes were