P0155 + P0332 OBD codes
After a few days out at Summit Point, I threw OBD codes P0155 (02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)) and P0332 (Knock Sensor 2 Circuit Low Input (Bank 2)) and they keep coming back. I'm trying to think this through before pulling the intake to replace knock sensor 2.
Something tells me this is from a fried wire... but the only damage I can find is months old: to the black loom over the Bank2 Sensor1 O2 extension - the wires inside appear to be fine. I do see some "fresh" melting on my CAGS eliminator but don't think that's related (and I'd have thrown a CAGS code, I think). Does anyone know if either
- a bad knock sensor can cause the P0155?
- the knock sensor 2 and Bank2 Sensor1 O2 wires run in a common loom? This is what I'm thinking but, like I say, the 02 wires (at least) look fine.
I think the P0155 code is secondary to the P0332 - that's why I'm thinking about "both" before tackling them 1 by 1. Next step for diagnosing P0155 alone is to swap Sensor 1 with Sensor 2 and see if the code moves. I've thrown just P0155 in the past after a day at the track and have been able to clear it and keep it off, no problem.
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