This past two weeks I have been getting the error code 'P0134 O2 Sensor CKT No Activite Bank1 Sensor1', every other day. I have stock exhaust, stock cat, greddy turbo kit, and the KPro. In the K-Manager software I do not have the CHECK on Disable P0134. What do you think is causing this CEL to come ON?

 

your second O2 is bad, replace it or disable it

 

Why would it say Bank1 Sensor1

 

p0134 is the code for the response on the 2nd sensor, why it says sensor 1 I can't say

 

wrong, P0134 is
Air Fuel Ratio (A/F) Sensor (Sensor 1) No Activity Detected
or
Air Fuel Ratio (A/F) Sensor (Sensor 1) Signal Stuck Lean

service manual basically says to check the connection/wiring and reset the ECU. if the code keeps coming back, replace the A/F sensor.

 

cool, thanks. I think the wiring is fine. So it may be something with the hondata or the sensor then.

 

I got some info....
when you disable OBDII functions in the k-pro(which is a modified stock ECU), this problem points to a set of checks a balances the ECU carries out to check if both sensors are working. When OBDII functions are disabled, the ECU will see this and realize the secondary O2S is not working(because you manually disabled it), at this time it will throw the P0134 DTC. The primary O2S stops dead in it's tracks as well.

This does not mean you need a new 02S(in the this case, using the k-pro with OBDII functions disabled). This means that the "disable P0134" function is not enabled and the ECU is still running the 02S checks. To solve this simple problem, you must enable the "disable P0134" function to keep the ECU from running the O2S checks. Your primary 02S will not stop responding from this point forward and there will be no more P0134 DTC's because this ECU test will no longer run. If your primary 02S does stop responding no matter what you do, then check wiring and/or replace 02S as needed.


I did enbled eveything and looks to be working ok....two days so far.