i was having problems with a faulty o2 sensor, i replaced it cleared the cel but it came back. (0503) returned that sensor and got another new one, just installed it cleared codes and they all came back.

do i have to drive around for a while before they clear? dunno wtf is going on.

 

i checked the voltage the sensor was putting out and it was reading in spec according the haynes, which is between .1-.9 volts. im not sure what else to do...is there just a period of time where the ecu has to readjust? anyone else go through this?

gas mileage sux!

 

i have a FSM and Haynes in the car but im gonna pass out in a min. ill look up what it says for you in the am but here's what the codes are from just in case you were unsure:

0901 - Front Right Heated O2 sensor heater
0307 - Closed Loop RH Bank

and you gas mileage is gonna b alll f'ed up. Here's all you need to know about O2 sensors: http://www.aa1car.com/library/o2sensor.htm

how did you clear the CEL?

 

i know what the codes mean, i'm just baffled as ive changed the sensor twice and codes are still popping up. i cleared the code using the ecu method, turning the screw and whatnot.

 

did you test the sensora to make sure they were not faulty? check the wires going to the sensor as well.

 

the harness is getting power. and the sensor is giving a reading within spec like i mentioned. the only thing i can think of is that it needs a certain amount of miles to readjust.

 

When I unplug and plug back in my MAF sensor, the CEL comes on for a while. Couldn't these 2 problems be part of a re-learning process by the computer?

 

i hope...i have no other ideas.