Engine Code 1133

[FlewbyurGT]

i am gettin and engine code 1133....i think it has to do with my o2 sensors...but if you could let me know any info thanks

[fguy1998]

insufficient switching bank one sensor one heated o2 sensor. 02 is probably junk. it's not making enough cross counts.

[FlewbyurGT]

is that the o2 before the cat?...and do you think it would cause it to misfire a slight bit like at like 2 percent throttle?...my MAF sensor is bad to...i jus ordered an SLP one...im goin to wait until i buy headers which is gonna be in the next month to fix the o2...thanks for the help

[2001NBMZ28]

Yes and yes, Bank 1 Sensor 1 is the driver's side precat 02.