My check engine light came on the other day and my code reader came up with a P1117 code. Any suggestions of what this could be or what should be checked?

 

bank one (driver's side) downstream(behind cat) o2 heater circuit.

I found it on google under "code p1117"

that was easier than looking in my scanner book

means you need new o2 sensor, should replace all four since the next one may be soon.


luck,greg