I have code p1177 and check engine light on. 2001 vw passat. What is this?

Question

2001 vw passat check engine light on code p1177 what is this?

Answer 1

Hi there

P1177 by definition is the o2 sensor correlation behind the catalytic converter on bank 2.

The most common cause of this code is the rear O2 sensor itself or an issue with the catalytic converter or wiring harness