Quote:
Originally Posted by CREWZIN
I'm not sure what a HEGO circuit is but the P0138 for your PT should be the upstream 02 oxygen sensor.
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I know we've covered this before and I'm not trying to argue but P0138 turned out to be my downstream O2 sensor.
You've mentioned it previously
what is this code as well...
To the OP, the downstream sensor at the cat was $25... unsure of the cost of the upstream. May be wise just to change both... I didn't though, I just cleared the code and changed the downstream sensor and it hasn't returned.
Edit:
It's a bit confusing to say the least... I got this message from Autozone's computer and was told it was the downstream sensor. I also got P2097 in addition to P0138.
P0138 (M)
O2 Sensor Circuit High Voltage
(Bank 1 Sensor 2)
Oxygen sensor input voltage maintained above normal operating range.
But looking at this
Ive got a 2006 PT Cruiser that has started idlei... - JustAnswer says it's the upstream.
I'm baffled... changing the downstream has not returned the code so I've just let it ride.