2 OBDII codes on '97 Q45

[bigblue]

Recently started setting MIL so I put it on an autoXray that yielded 2 codes

P0161 O2 heater circuit malfunction bank2 sensor2

P0330 knock sensor 2 bank 2

My mother's car, 110k miles. Oil and air filter changed regularly. I know she has occasionally run a tank of less than premium fuel in it at times so I was wondering if the knock sensor code could be from that or if they are common to fail on these engines.Still runs smooth, Might be original plugs (yikes!)

Cleared codes last night, lets see when the MIL comes on again. I'll start with changing all 8 plugs.

Anybody have experience with this?ThanksHenry

[elwesso]

Recently started setting MIL so I put it on an autoXray that yielded 2 codes

P0161 O2 heater circuit malfunction bank2 sensor2

P0330 knock sensor 2 bank 2

My mother's car, 110k miles. Oil and air filter changed regularly. I know she has occasionally run a tank of less than premium fuel in it at times so I was wondering if the knock sensor code could be from that or if they are common to fail on these engines.Still runs smooth, Might be original plugs (yikes!)

Cleared codes last night, lets see when the MIL comes on again. I'll start with changing all 8 plugs.

Anybody have experience with this?ThanksHenry

All seem to be common issues...

The KS seem to be kinda iffy on all 90-01 nissans, unfortunately the Q has 2 where most others have 1...

The only one causing the MIL is the o2 sensor, which i would replace.. Your car is certainly not running optimal with the KS bad.. Id replace those as well but it can wait.