This is what I found out at Autozone. The code was p0137 O2 sensor cir. Low Volts Bank 1 Sensor 1. I don't know where Bank 1 sensor 2 is when you are looking at it. I do know these sensors are on the...

I have a 2001 Volvo s80 and the check engine light has been coming on every time we start the car for the past 6 months but after a couple of minutes it goes off. Now the service engine soon light...