GoalPoster

Good afternoon folks.

I have a Lexus IS250 RWD. A few days ago it threw me a Check Engine Light and some other neat colours on the dash (VSC, orange squiggly tire icon, big old red triangle with '!' in it).

Picked up an OBDII reader. Threw me P0031 as a code which means . . .

Heater Control Circuit Low Bank 1 Sensor 1

Here's the dumb question for the day. Which side of the engine is 'bank 1' as I'm apparently replacing an O2 sensor.

I just want to replace the correct one!!!

Any advise or tips would be helpful.

Thanks in advance

Oh yeah . . . it's a 2008

Jeff Lange

iTrader: (1)

Bank 1 is the passenger side bank on the IS, sensor 1 is of course the one in the manifold (A/F Sensor).

Jeff

06isDriver

sucky.....Good luck changing that out without removing the manifold. It's SUPER tight in there. I just installed the ppe headers and it was a bia.