Jump to content

P2A00 Code (HO2S 1, Bank 1) - How to diagnose cause with data?


TomK

Recommended Posts

 Hi all,

 

Got an '08 350z here and I'm getting the P2A00 Code which is for the Oxygen Sensor 1 on Bank 1. I bought a cheap OBDII scanner to confirm the fault and to try to find the cause by using data from the sensors. However, I am not 100% sure on what I should look for. I've researched online but my issue isn't clear. I'm aware it is not necessarily the sensor itself, but the values it is outputting are off from what they should be, hence the fault code. I know potentially an exhaust leak can be the cause? Anyways, I'd like to attempt to diagnose it myself before trying to fix or replace anything.

 

 I've attached some graphs to show the data I'm getting. I'm hoping someone here might have some more experience and knowledge to help?! If more data is required let me know what I should be trying to look at. I've read about normal voltage readings are below 1, however I notice Sensor 1 on Bank 2 is going above 1, but that isn't the sensor with the fault code.

 

Any suggestions or help, no matter how small, would be greatly appreciated!

O2S1 B1 & B2 Voltages.jpg

O2S1 B1 & B2 Short Term Fuel Trims.jpg

O2S1 volt B1 & MAF.jpg

O2S1 volt B2 & MAF.jpg

Edited by TomK
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...