Get O2 'Check Engine' after removing Cat. (1 Viewer)

[thebovees]

Get O2 'Check Engine' after removing Cat. O2 sensors were replaced at the same time. Any idea about fixing it without shutting down all 'Check Engine' warnings? Also, will this warning cause a increase in fuel consumption?

 

[thebovees]

Get O2 'Check Engine' after removing Cat. O2 sensors were replaced at the same time. Any idea about fixing it without shutting down all 'Check Engine' warnings? Also, will this warning cause a increase in fuel consumption?

Found that the cable that connects to the left O2 sensor connector got destroyed when it came loose from being held and rubbed against the front drive shaft completely wearing through the wires. Attempting to repair by splicing the wires back together the shielded white wire broke just as it enters the connector. So now it is not repairable. Any ideas about replacing the cable or what?

 

[ozarkmud]

I'm not sure if this is your issue or not, but thought it was worth mentioning.

I think the '95-'97 (maybe '96-'97?) Landcruisers have pre and post-cat O2 sensors. That would definitely explain part of it.

Of course, a damaged cable is another issue. This is highly year dependent, so I would share that either way. Although "left" O2 sensor makes me wonder if it's one of the later years? I'm not as familiar with them.

 

[thebovees]

I'm not sure if this is your issue or not, but thought it was worth mentioning.

I think the '95-'97 (maybe '96-'97?) Landcruisers have pre and post-cat O2 sensors. That would definitely explain part of it.

Of course, a damaged cable is another issue. This is highly year dependent, so I would share that either way. Although "left" O2 sensor makes me wonder if it's one of the later years? I'm not as familiar with them.

The '94 only has pre-cat O2 sensors! Attempting to repair the wire connections, it only got worse as the main signal wire broke off right as it enters the connector, this is on the vehicle side not the sensor side. So, I will be replacing the connector pair with a pair of water proof connectors I have used many times. I expect to have this done in the morning and will report back.

 

[thebovees]

The '94 only has pre-cat O2 sensors! Attempting to repair the wire connections, it only got worse as the main signal wire broke off right as it enters the connector, this is on the vehicle side not the sensor side. So, I will be replacing the connector pair with a pair of water proof connectors I have used many times. I expect to have this done in the morning and will report back.

Got connector replaced, not original type but a pair I have been using on other projects and, now, NO check engine lights. Apparently, the mechanic that took out the cat and replaced the O2 sensors did not secure the cable and, see first picture. My fix is in the second picture.