Okay I got these codes a few months back, i just replaced the 02 sensor, cleared the codes and a few minutes later its back on. We logged it after and the sensor is working right, Although it shows that I dont have fuel trim, its all zeros on the scan. Anyone have an idea on what to do next?

 

125 is a coolant issue
low coolant level, bad coolant temps sensor

 

I know, but i am trying to fix the 134 code first, because i will do a cooling system flush soon, so I am just gonna fix that sensor then. Any ideas on the o2 issue?

 

I have a p0134 too. Did you change the exhaust manifold o2 sensor or the catalitic converter o2 sensor?

 

The code is reseting immediately? That usually indicates a wiring problem to the sensor(s). When you clear the code it will reset your fuel trim to 0. Give it some time and the fuel trims will start relearning.

 

^
I code pops back within like 3 mins and when i pull the codes again it will have 4 codes, two of each. Dont know where to look for wiring problems.

 

i checked the connector on the valve cover and it looks good. I didnt know where to look after that.

 

what symptoms does your car give for the P0125 to show itself?

 

There are no symptoms for that code, everything is running cool, coolant level is okay at max, never had to refill the reservior.

 

so basically just to change the sensor then?

 

yes, i might just have to change the sensor, but i am more concerned about the o2 sensor code that keeps on popping up, i just dont want it to be an ECU issue

 

anyone have any more ideas on what's throwing the CEL for the O2 sensor?

 

anyone?

 

help please

 

0's in your fuel trims can be caused by:

Idling in open loop

Idle is too high and is resetting trims

Malfunction

Who tuned it last?