Jyankel

Hi folks, I just got this car from my dad, who took good care of it. It has 118000 miles and runs great. The engine light came on recently, and without pulling the codes I just replaced the fuel cap. The car also recently started consuming oil ( no leaks or smoke seen, and tailpipes don't show any oily residue) about a quart every 2 weeks or 300 miles. I got the codes read today at Advance auto. It had 9 codes, but 4 were duplicated.
61-1
P2247 x2
P0154 x2
P2197 x2
P0171 x2

Can anyone help me identify the exact O2 sensors I should replace? Is this related to the oil consumption? Thanks for any help, I really love the car.

Joe

Jyankel

Update.

Since the guy at Advance wasn't very helpful, I took the car to Autozone and code the codes read again. They told me all the codes related to one O2 sensor and to replace the upstream sensor close to the firewall. I bought the part for around $90 and changed it.. but the light did not go out. I guess I'll have to go back for another scan.

MSchu

reset the ecu first

Jyankel

I disconnected the negative battery cable while changing the sensor. Is there something else? I figured a different code is going to show, or the Autozone guy (who didn't show me the codes) didn't read them all and more than one sensor is bad. The engine light was off for maybe the 1st minute after starting the car before it came on again, but it hasn't gone away even after driving it 30+ miles this morning.

lazlong

To reset the PCM: With the ignition OFF, remove the ECU fuse from the nunder-hood fuse/relay box for at least 10 seconds.

If that doesn't work then you either have an open between the sensor and the PCM or a bad connection at the sensor connector or PCM. Recheck the connections then get a service manual to do the diagnostic tree.