my car is throwing a cel code P0141 Secondary Heated Oxygen Sensor (Secondary HO2S) (Sensor 2) Heater Circuit Malfunction, right after i installed a jdm itr header bolt on to a stock cat(i know i know, it will soon be replace when i get enough money for a high flow cat and a resonator to go with my oval muffler i have now.
my questions are if replace the o2 sensor would that solve the problem?
or would i messed up my engine if keep driving the car with the cel on until i replace the cat? cuz i know the cel will come on again with a high flow cat. so far i drove the car over 100 miles with the cel on without noticing any problem.
any kind of help would be appreciated, thanks!!


Modified by 3rdgenLS at 9:35 PM 3/13/2005

 

any1

 

The O2 sensor heater simply gets the O2 sensor working more quickly when you start up. Especially since it's the 2ndary sensor it shouldn't damage anything.

Unplug the 2ndary sensor, look for the 2 same-color wires from the sensor itself (probably black). You should measure 10 to 40 ohms resistance between them, & no continuity at all to ground. If not, get a new sensor.

If the sensor heater's OK, then look for shorted or disconnected wiring for the heater circuit. Got a wiring drawing?

 

i'll check the wiring, thanks! do you know where can i get a wiring drawing? i'll try to search around.