Code P0171/0561 after Thermostat change

[Chappy86]

So I changed my thermostat for code P0128. I changed it about 2 years ago for the same code and went away until now. Luckily, lifetime warranty. Anyways, after changing the thermostat got the codes mentioned in the title. I already replaced the intake hose about a year ago for a hole in it that was also causing the p0171. Code went away.. Inspected the intake and other hoses, no holes. Also have rough idle like theres a leak. Any clues?

 

[efaily]

How many miles? P0171 is common after the PCV valve failure.

 

[Chappy86]

How many miles? P0171 is common after the PCV valve failure.

60,000ish

 

[Chappy86]

This is what I am getting after the thermostat change. Car is idling rough and it smells.

 

[Chappy86]

Well, if anyone reads this in the future, the fix was changing the o2 sensor before the cat. Solved all the problems, even the TCS/ABS. Don't know how that ties in the 02 system.

 

[efaily]

Glad you got it resolved! That's odd that an O2 sensor caused that many different codes.