How to repair codes P1166 and P1167?

131,000 MILES • 4 CYL • 4WD • AUTOMATIC

LARRYTHEFIZZ

Two codes coming up, P1166 and P1167. Heater Circuit fault what is it, and how to fix?

Sep 2, 2009 at 4:06 AM

KASEKENNY

These are o2 sensor codes. So, we need to run through the testing attached in order to determine what the issue is.

However, here are a couple of guides that will help with this:

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Please follow the testing below and let us know what questions you have, and we can go from there.

Thanks

Images (Click to enlarge)