occasional and different O2 sensor codes
07-14-2017, 08:03 PM
#1
Member
Thread Starter
Join Date: May 2017
Location: Los Angeles
Posts: 127
occasional and different O2 sensor codes
First of all, I am a total novice in engine electronics, trying to learn as I go.
I started getting codes 0304 and 0707(KS and rear o2) occasionally a few weeks ago. Each time the CEL came on I just checked the codes and reset it.
I know the KS code is a ghost.
Lately though, things are different and I am getting 0304 and 0303 instead of 0707. So now it's the FRONT-left o2 instead.
Why did the rear o2 stop setting a code? And why did the front-left just start?
Should I really replace the front-left o2 when it may just 'fix itself' like the rear did?
Normal behavior has been for the CEL to come on once or twice a week, and seemingly more likely after driving harder than usual.
I started getting codes 0304 and 0707(KS and rear o2) occasionally a few weeks ago. Each time the CEL came on I just checked the codes and reset it.
I know the KS code is a ghost.
Lately though, things are different and I am getting 0304 and 0303 instead of 0707. So now it's the FRONT-left o2 instead.
Why did the rear o2 stop setting a code? And why did the front-left just start?
Should I really replace the front-left o2 when it may just 'fix itself' like the rear did?
Normal behavior has been for the CEL to come on once or twice a week, and seemingly more likely after driving harder than usual.
07-16-2017, 04:09 PM
#2
Senior Member
Join Date: Jan 2011
Location: Central AR
Posts: 3,041
How many miles does your car have on the odometer and how long have you owned it?
Is your car a Federal or California version?
It looks like you might need to consider a set of new O2 sensors.
Whenever I buy a used 4th gen usually with mileage over 120,000, I refresh the O2 sensors with a set of new NTK. That keeps away any O2 sensor codes for many years to come.
Is your car a Federal or California version?
It looks like you might need to consider a set of new O2 sensors.
Whenever I buy a used 4th gen usually with mileage over 120,000, I refresh the O2 sensors with a set of new NTK. That keeps away any O2 sensor codes for many years to come.
07-17-2017, 06:21 AM
#4
