Oxygen Sensor Problem P1150, P1155

Hi,



I recently registered to this forum even though I've been regularly reading some information.



I recently purchased a toyota avalon 2000 and a month late my check engine light poped up with the following codes: P1150 and P1155



The print out from autozone suggest it is bank 1 sensor 2 after reading in the forums on some places I read that this is the downstream sensor below the passenger seat so I bought a new sensor and replaced it. CLE came back on after I cleared it. After some more reading other people suggested is the sensor behind the engine so I replaced this one two.



With 2 brand new sensors I still get the CLE shall I invest another $180 and replace the last sensor?



Any ideas what else could be causing this problem. I haven't noticed a difference in the gas millage so far, but this CLE light has to go out and I will do whatever it take to remove cause it is very unpleasant plus the VSC does not function when having codes.



Any input will be very appreciated.



Thanks in advance

Reply 1 : Oxygen Sensor Problem P1150, P1155

Quote:

Originally Posted by kminev Hi, I recently registered to this forum even though I've been regularly reading some information. I recently purchased a toyota avalon 2000 and a month late my check engine light poped up with the following codes: P1150 and P1155 The print out from autozone suggest it is bank 1 sensor 2 after reading in the forums on some places I read that this is the downstream sensor below the passenger seat so I bought a new sensor and replaced it. CLE came back on after I cleared it. After some more reading other people suggested is the sensor behind the engine so I replaced this one two. With 2 brand new sensors I still get the CLE shall I invest another $180 and replace the last sensor? Any ideas what else could be causing this problem. I haven't noticed a difference in the gas millage so far, but this CLE light has to go out and I will do whatever it take to remove cause it is very unpleasant plus the VSC does not function when having codes. Any input will be very appreciated. Thanks in advance

Bank 1 is the bank at the rear of the engine compartment; sensor 2 is the "downstream" or farthest down O2 sensor.

P1150

Air/Fuel Sensor Circuit Range/Performance. (Bank 1 Sensor 2)

P1153

Air/Fuel Sensor Circuit Response. (Bank 1 Sensor 2)

P1155

Air/Fuel Sensor Heater Circuit. (Bank 1 Sensor 2)

Here are what the codes mean. Since you are getting both the range code and the heater code, you should check the wiring harness and plug to make sure they are not broken/burnt/melted. Did you get both the same codes back? Also, did you get a "generic" sensor that you had to wire in, or one made to fit that plug?

Reply 2 : Oxygen Sensor Problem P1150, P1155

1150 and 1155 are for bank 2 sensor 1. The one in the front of the engine. You replaced the wrong one.

Reply 3 : Oxygen Sensor Problem P1150, P1155

Quote:

Originally Posted by csaxon 1150 and 1155 are for bank 2 sensor 1. The one in the front of the engine. You replaced the wrong one.

csaxon: Crap - you mean Google lied to me this AM??? I thought you could believe everything you found on the internet!!



kminev: Sorry for the misleading information this AM. I agree you replaced the wrong one based on wrong info from autozone and internet.

Reply 4 : Oxygen Sensor Problem P1150, P1155

First of all a big thanks for everyones' quick answers very much appreciated....



So the sensors I replaced are: the one under the pass. seat and the one behind the engine.



From what I am reading from you replies you are suggesting that the sensor that actually needs to be changed is the one on the very front by the radiator, am I correct?



The codes I've got read bank 1 sensor 2 is that the front sensor.





Also after changed the two sensors I cleared the code the only code that came back is P1155





Can you guys help me conclude what to change I am $300 poorer so I guess will be shopping for the last sensor and the only one that is still old and changed.



Is ebay a good place/cheaper to find the sensor and what part number am I looking for to be certain I am getting the right one.



Thank you

Reply 5 : Oxygen Sensor Problem P1150, P1155

I replaced the sensors with bosh no the universal ones!

Reply 6 : Oxygen Sensor Problem P1150, P1155

Quote:

Originally Posted by bobflood csaxon: Crap - you mean Google lied to me this AM??? I thought you could believe everything you found on the internet!! kminev: Sorry for the misleading information this AM. I agree you replaced the wrong one based on wrong info from autozone and internet.

Auto-zones print out from the scanner suggested it bank 1 sensor 2 are they wrong ?

Reply 7 : Oxygen Sensor Problem P1150, P1155

Quote:

Originally Posted by kminev Auto-zones print out from the scanner suggested it bank 1 sensor 2 are they wrong ?

Kminev: Yes, it appears that Autozone is wrong; and I found the same wrong information on the internet. The fact that you already replaced the two "Bank 1" sensors w/o fixing your problem supports that conclusion. Csaxon is correct - your codes indicate Bank 2 Sensor 1, which is the one in his picture. If you want to try and confirm this, call your Toyota dealer service department, give them the codes, and ask them what they mean.



If you want to go to the trouble, and you still have the old parts, you could take the new sensors out, return them to Autozone, tell them they did not fix your problem, and get your money back. Then get the sensor to replace Bank 2 Sensor 1 at the front of the engine.



Good luck, and let us know when you finally resolve this.