I have a 2006 Mustang GT with about 113K miles. Just a little background info, it's supercharged, long tube headers with high flow cats. Recently I drove in heavy rain and started getting all kinds of DTC codes, P0138, P2196, P0132, P0152, P0430, P0158. I figured it might be due to the deep water I had to drive through. I replaced all 4 o2 sensors and now I get the P0430 and P0420 DTC's. My cats should be working just fine since they're not more than 10k miles old. Any ideas before I try the o2 sensor spacer trick.

 

maybe if it has a chance to dry out, the problems will go away? looks like we will have some good sun today, maybe try leaving it outside in a hot and sunny spot?

 

When I checked my systems status they all are good to go for emissions inspection with the exception of the evap system which has always given me an issue. It takes forever to complete.

 

so I guess a day in the sun made it happy?

 

Yep, I guess it did. I can now go get it inspected then go back to my Brenspeed no o2 tune. I hate that I have to go back and forth once a year but thats NY for ya.