P0037 is a low voltage to Ho2s downstream and 0036 I believe is for a fuse on the same sensor. I replaced the sensor, but still getting codes. Does anyone know where the fuse is for this sensor? I checked the engine and the interior boxes, but none of the descriptions mention this sensor.

Also, can being catless cause these codes to pop? I thought catless would only bring about the usual P0420. Have to get through emissions soon, and just want to double check before I throw the stock pipe back on, as it's a PITA to get to those bolts.

 

Check under the fuse box in engine bay and look for a 10a fuse marked ems, its the fuse for the emmisions.

 

Unfortunately there are is no fuse labeled EMS at all. Here are the 10A fuses under the hood -

DRL
Horn
SDM
CNSTR Vent
A/C Clutch
CHMSL
ABS2
BCK Up
RT hi beam
RT lo beam
LT hi beam
LT lo beam
EXH
ENG VLV SOL
AIR SOL
PRK Lamp

 

Well I threw the stock downpipe back on and it's still throwing the code. To the dealer we go.

 

The o2 sensor connector was corroded...wtf. Oh well, at least it's fixed and ready to pass emissions late.

 

Just for future reference, it's EXH under the hood fuse box.

 

Thanks. After digging around I figured that was probably it, and it wasn't blown at all. I'm curious what caused my connector to degrade in the first place.