I have a 2003 Mach 1 with about 130k miles. I noticed I had coolant leaking and took it to a shop to see what needed to be replaced. Got quoted at $1200 to replace radiator, water pump, and reservoir. I bought the parts myself and did in the backyard everything is good to go. After bolting it all back up, bleeding coolant system, filling, etc, I'm getting the following codes:

P0174 - System too lean (Bank 2)
P1130 - Lack of upstream heated O2 sensor switch-Adaptive fuel limit (Bank 1)
P1131 - Lack of upstream heated O2 sensor switch- indicates lean (Bank 1)
P1150-Lack of upstream heated O2 sensor switch- Adaptive fuel limit (Bank 2)
P1151 - Lack of upstream heated O2 sensor switch-indicates lean (Bank 2)
P1152 - Lack of upstream heated O2 sensor switch- indicates rich (Bank 2)

I'm at a loss... It's worth mentioning that before replacing everything I was already throwing low voltage codes for Bank 1 and 2 sensor 1. Could I just need new O2 sensors? Is it safe to drive this way?

Also - I have Kook's long tube headers and high flow cats if that could make a difference as well. Borla catback after that.

Thanks for all and any help!

 

BUMP - I need help on this... It seems to me that replacing all the cooling components are irrelevant to the issue I'm getting. Vacuum pressure is around 23 at idle from what my computer is reading. Suggestions?

 

I was getting a lot of those same codes off and on for a while after I did the 4v swap and they appeared to be nuisance codes because everything seemed OK until it wasn't. I started to notice degraded drivability until it wasn't drivable at all. It never died but I had a complete loss of power. I changed the O2 sensors and now it's like driving a new car.