Just to confirm.
When it comes to replacing Oxygen Sensors I am under the notion that replacing all 4 would be preferred? (Had codes P0134 and P0135 Leading me to bank 1 sensor 1 issues... O2 circuit no activity and O2 heater circuit).
By installing the two fronts only, am I asking for problems with the system?

 

Nope. The rears are only used to check to performance of the cats and perhaps the performance of the front sensors. They do not need to be replaced unless you get codes for them.

 

Thanks, perfect!
May put them in later tonight.

 

The new 02's may not fix the issue, if it doesn't, get back to us so we can help. Also make sure there is no engine oil in the connectors, clean them out if there is.

 

Hey Mike,
I attacked the O2's this morning. I figured I would take it a step further than just replacing with the new ones.
Switched them Left to right, right to left.
Drove to O'reilly's and cleared the codes off.
I am assuming that if I get codes pertaining to a bad O2 sensor they will now flop to Bank 2 Sensor 2?
My plan is to drive it a few days and see if I can get some codes.
Is this a rational plan of attack?
Connections were oil free BTW

 

That good they were oil free and dry and good plan drive it to see if they return.

 

I had switched the front, upstream O2's from left to right, right to left and been waiting for the codes to get thrown. There were codes on Bank 1, assuming I will sooner of later see a bad bank 2 code--- if in fact that O2 sensor is bad?
Well, a week later and about 150 miles of driving and still no codes?
Not jumping to any conclusions yet... or should I?
Going to give it another week. Have the 2 new sensors ready to go in.

 

Hi CANAM ....

Can I ask you where you got the sensors from and for how much?

Cheers'
Dave