Check engine light

[9COOP5]

What can be done if the check engine light is still on after the bank 2 sensor 2 was changed on a 2002 XLS Explorer? The code read change this sensor.

 

[domct203]

Did you reset the codes after the repair?

Are you 100% sure it’s the same code now?

 

[9COOP5]

domct203 if you mean disconnect the negative battery cable yes.

 

[domct203]

I meant with a OBD scan tool and actually clear the code.

So to be clear, after the repair the CEL was off, then came back on?

You didn’t reply if you are getting the same trouble codes.

 

[9COOP5]

I did not clear the CEL with an OBD scan tool.

I am getting the same code for the oxygen sensor that was replaced.

 

[domct203]

I would then guess that the CEL never went off, correct?

The vehicle may just need to go through a couple of ‘learning’ cycles.

To force a re-learn scenario, disconnect both terminals from the battery, then connect the cables together to drain any stored voltage in the PCM, about 10 minutes should do it.

After that, reconnect the cables to their proper posts on the battery and start her up. The CEL should be off, and the truck might run funny for a few miles while it is receiving all new sensor data. If the CEL comes back on, then there is most likely another issue.

What code did you originally get?

 

[9COOP5]

The CEL did not go off. P0159