BigL0U

As per AutoZone references:
P0159 - Sensor circuit slow response ( Bank 2 Sensor 2)
P0158 - Sensor circuit high voltage ( Bank 2 Sensor 2 )

so now what..i was told this might be the O2 sensor since i had put in a HKS sport exhaust ... and yes the Cat is still on it. Also should i wait for the CEL to pop up again before i take action. Code had been deleted by AutoZone. Please advise thanks.

sloppymax

iTrader: (8)

a catback should nothing to do with this code. your code is for a secondary o2 sensor which your 2k1 cali spec car has two of. both are before the main cat so unless someone was just really careless then you just have a bad o2 sensor. if it is truly bad then the code will cycle back out.

Epacy

iTrader: (6)

First thing to do would be to look at the threads that already cover this topic.

danger300z

iTrader: (4)

i had they same code and i replace my o2 sensor , then the problem was gone.

BigL0U

thanks ... how much would it be to replace the 02 sensor? any highly recommended?

sloppymax

iTrader: (8)

check them out at www.oxygensensors.com they had the best prices last time i replaced one.