P1153 after a mod
 

I recently gutted my cats because they were way clogged. After I put the pipe back on my truck idles like crap and is consistently throwing a P1153 code. I know what the code means. I just don't see how removing the cats would cause that problem. It runs good after I reset the code until the drive cycle is complete. Then it go's back to the bad idle and poor mileage. Aside from putting new cats back on and swapping out the sensor what else can I do to correct the issue? Thanx. :confused:

Just delete any codes from the second set of 02's problem solved

do you have any exhaust leaks? 1153 is the front 02sensor.

I have those codes(P1133 and P1153) in my truck after installing my long tube headers. Those codes are associated with the front o2 sensors. Sometimes it's due to them not heating up enough after opening up the exhaust. I just deleted mine and no negative impact on my idle or mpg my truck.

insufficent switching bank 2 sensor 1, I dont know about you guys but thats the rear 02's on my truck

bank2 sensor 1 is passenger pre cat o2,

had it said, bank 2 sensor 2 it would be post cat 02:)

check for leaks in the exhaust. if it were rear o2 sensors the truck would still run the same. might need a new sensor.

Bingo!

Gutting your cats will let heat escape faster. These codes almost always show up on a new header install. If they are good headers that get rid of heat.

Come on 02sierraz71_5.3, I know you know bank 2 is the passenger side...bank 1 is the driver side. Sensor one is the front...pre-cat sensor. You been drinking this morning? The rear o2's don't effect drivability...just reports that the cats are working or not.

No but good god I tied one on last night, good thing I dont have to work today :barf:
1's and 2's are a little hazy guess I dont recover like I used too.

thats funny, they label parts on the trucks like they do on ships. starboard to port then bow to stern.