CEL codes

[4G Power]

Recently my car started running really rich - like 11:1 while just cruising. I pulled the codes today, and I got these;

P0400- EGR Flow Malfunction (from my EGR delete, will hide once I install my dsmlink)

P0170- Fuel trim malfunction (bank 1) (bad upstream o2?)

P0141- O2 Sensor Heater Circuit Malfunction (bank 1, sensor 2) (bad downstream o2?)

P0125- Closed loop fuel control insufficient coolant temp

P1105- Manufacturer Control fuel air metering

Should I replace the upstream/downstream o2s? What about the other codes?

Thanks

 

[Firsts tuner]

Sounds like coolant temp sensor. If it is malfunctioning it can potentially do all sorts of weird things. I would start there first and see what happens. Make sure you clear the codes after you replace anything so the computer isn't compensating for something you've already fixed.

 

[2GtalonNJ]

im getting the P0125 code too
i have a code reader so i pulled it out while driving the data on the coolant temp was 200ishF
is that low doing about 60mph on the highway, in about 40-55F weather?