oxygen sensor readings

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oxygen sensor readings

Postby Timmy_t » Fri Feb 03, 2017 10:26 pm

I have a gen 4 pre facelift H6 and trying to get to the bottom of an issue.

i scanned my car and read some of the live data last week.

The drivers side cat was done and the O2 sensors at the front and back were reading 2.7+/-. At first i thought it was the sensors so changed them but still changed nothing.
So i changed the cats for some new ones. The sensors on passenger side are reading .6+/- (I've read thats a good reading but please correct me if i'm wrong) but i cant understand why the drivers side is reading so high.

Should i be looking for another issue?

is the air/fuel too lean/rich? and what could some of the causes be?

just so that i can start checking of a list of what i can check
Posts: 3
Joined: Fri Aug 19, 2016 5:08 pm
Car: Subaru Liberty H6 3.0r spec.B
Real name: Tim

Re: oxygen sensor readings

Postby riblit » Mon Jul 31, 2017 9:53 am

A static reading doesn't mean much. The pre cat O2 sensor is part of a feedback loop. The post cat sensor will tell you if the cat is working correctly.

Watch this https://youtu.be/5WnM_NsOtd8 for insight.
Posts: 6
Joined: Sun Jul 30, 2017 1:01 pm
Location: Sydney
Car: 2000 Liberty 2.5NA
Real name: John

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