Hey everyone. Haven't been around in a while. Had my engine light come on today in my 03 Concorde Limited. Did the on/off thing with the key and came up with P-0138. From what I can find it's Oxygen Sensor Circuit High Voltage (Bank 1, Sensor 2). Just wanted to see if anyone could tell me if this is accurate.

Thanks,

Adam

 

P0138-O2 SENSOR 1/2 VOLTAGE HIGH Dont get a bosh sensor use dealer of Denso

 

Thanks! I was looking at sensors online, and was wondering if this was an "upstream" or "downstream" and left or right? (Not sure if the left or right really matters.)

 

And how are the Delphi sensors?

 

What are the chances that the cat is going bad, and that's causing the sensor to get a bad reading? 88,000 miles.

 

Or how about NGK?

 

NGK is ok 1 means bank 1 2 means down stream

 

Thanks!

 

Okay, already orded a Denso, but now the light has gone out on its own. I'm guessing it's just a matter of time before it trips again, but just wanted to double check that I should go ahead and switch it out.

 

will not pass emmission test. check engine light on. codes 174.rich or lean air fuel ratio condition on bank 2. auto zone did check paper says if bank 1 n 2 are set together suspect a fuel pressure condition or maf sensor fault.then says failed heated oxyen sensor bank 2 sensor 1. which means what upstream or downsteam left side or right or doesnt it matter. thank ive been back yard mech for 38 yrs reading books and online to fix. always fix problem I need some help thank