O2 sensor help

[jwangelin]

Hi,Yesterday the check engine light went on on our '06 vibe ~80,000 miles. I took it to autozone and their scan tool said it was a heated oxygen sensor bank 1 sensor 2 issue. Which one is it? Pre or post converter? These are not cheap replacements, and just throwing a $100 sensor may not fix it.Any suggestion?Thanks in advance,Jon

[joatmon]

sensor 2 is the one after the cat.what was the CEL code? I think P0420 is for that sensor, and I only cured that in mine by replacing the cat. Hopefully yours will the be the sensor, which costs less.you say ~80K miles, check the terms on the emissions warranty, if you are less than 80K, it might still be covered

[jwangelin]

PO138 came up, the counter guy said it was the pre-cat sensor but I wanted to make sure.Thanks for the quick replyJon

[jjhendri]

I have a '03 GT with 119,000 miles and I just had the check engine light come on, the code is P0135. Is this the one on the engine? If so, how do you replace? I see how to replace the one by the cat but not anything on the 1 on the engine. Also, does the engine have to be warm to remove? Saw a post on the forum that someone stripped the manifold when the engine was cold and trying to remove.Update 03/27/10 3:06pm EST: see the attached photos and can you tell me if these are the 2 OS? If they are how to get to the 1st one (from the passenger side floor mat also)? See 2nd post for addt'l photo

Attached files

[jjhendri]

See attached

Attached files

[star_deceiver]

Yup, those are O2 sensors. You'll have to unbolt the sensor and/or follow the wiring through the car to wherever the plug is located!

[jjhendri]

Thanks Star_Deceiver, so the P0135 is the 1st sensor (right)? Has anyone used the NGK O2 Sensor?

[star_deceiver]

http://www.obd-codes.com/p0135Looks that way. I've never had to replace an O2 sensor.http://forums.genvibe.com/zero...78876 Offers good advice for sensor removal!!!

[jjhendri]

Ok, changed the O2 Sensor using a NTK (NGK) Part 21547 and replacement was fairly simple. Plugged in the OBD II and notice that it still threw a P0135, see this:View / Vehicle Trouble Log / Record Problem 3OverviewTime :04/06/2010 04:28 AMVehicle :Vibe GTCarChip -4264-BTrouble Code :P0135Description :O2 Sensor Heater Circuit (Bank 1 Sensor 1)Comments :Engine StatusFuel Pressure (Gage) :Intake Manifold Pressure (Absolute) :Engine Coolant Temperature :183.2 °FCalculated Load Value :24.3 %Engine Speed :3,866 RPMVehicle Speed :53 MPHFuel Trim StatusShort-Term Fuel Trim (Bank 1) :0.00 %Short-Term Fuel Trim (Bank 2) :Long-Term Fuel Trim (Bank 1) :-3.91 %Long-Term Fuel Trim (Bank 2) :Fuel System StatusFuel System 1 Status :Fuel System 2 Status :Closed loop; using oxygen sensor(s) as feedback for fuel control.But the CEL is not on so I'm not sure what's going on. Any help would be appreciated.