Xoutpost.com - P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

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P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

2001 4.4

So I have code P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

Previously I had P0171 System too Lean (Bank 1) and
P0174 System too Lean (Bank 2) as well but I found a leak in the intake tube and repaired it then cleared the codes.

A short trip later and the SES light comes back on, I check the codes and now only the P0155 code is there. Could there be another leak somewhere of is it likely that the 02 sensor is bad? Anyone know of DYI's for replacement?

Also, which side is bank 2?

Thanks

Quote:

Originally Posted by Heckler (Post 721456)

THE BANK 02 SENSOR IS THE PASSENGER SIDE, HOWEVER I'D RECOMMEND YOU TO REPLACE ALL 4 SIDES JUST LIKE I DID ON MINE. AND I'TELL YOU... THE PERFORMANCE IS MUCH BETTER NOW AND YOU WILL BURN LESS GAS THAN EVER BEFORE. HOWEVER I'VE BEEN EXPERIENCING THE SAME FOLLOWING CODES AS YOU: P0171/P0174. BUT I WOULD BE MORE HAPPY IF YOU COULD POST A PICTURE WHERE YOU HAVE DISCOVERED THE LEAK FROM THE INTAKE TUBE.

01 X5 4.4i M62 ENGINE (BLUE COLOR]