Hey All, I had the check engine light come on and it spit out the following codes.
P0051 HO2S Heat Control Cir. Low Bank2 Sensor1
P0152 HO2S Cir. High Voltage Bank2 Sensor2
P0155 HO2s Heater Cir. Bank2 Sensor 1
P0158 Cir. High Volt Bank2 Sensor2
P0161 HO2S Heater Cir. Bank2 Sensor2

Question do they both go at once or can one fault causing the second to fault?
I pulled lightly on the pre-cat sensor Bank2 Sensor1 and the plug fell out no force at all, maybe that's the problem, reset the code haven't drive to see if code comes back.

Second question does this have a big effect on fuel economy as it seem I am getting only around 11-13 mpg. And I have the 4.7

Also just found out the the tires are different from what is posted in the door.
Door states 15" 235 wheels & tires
I have 16 265 wheels & tires
So will this change screw up the fuel reading display?
The speedo will be off I think it goes lower say reading 45 kms when actually going 50kms?

 

Well I have driven the truck now for about 30 miles and still no engine light so it looks like the one loose plug fixed the O2 problem.

Anyone got any answers to the oversized tire question?

 

i went from a 2457016 to a 2657516 and it went off 5mph search online and check its all based on your tire height the dealer charged me 20 bucks to change the speedo or you can do it with your programmer

 

Bigger tires will make the speedometer say you are going slower that you actually are. They can also make fuel economy worse because the engine has to work harder to get up and going off the line.

 

I've been using this for years to calculate tire size differences and the effect on the speedo.

http://www.miata.net/garage/tirecalc.html