No, I was talking about the o2 sensor on the exhaust manifold before the cat. Oh yeah, one more question, I was always told it was my primary o2 sensor (before the cat) that had the heater circuit malfunction but apprently I found a thread that said it could possible be the secondary o2 sensor (after the cat). Anyone with a Helms that can check?

P0137;(63)-secondary heated o2 sensor circuit low voltage.
P0138;(63)-secondary heated o2 sensor circuit high voltage.
P0141;(65)-secondary heated o2 sensor heater circuit malfunction