Among the 4 codes I have...0031 is one of them. I may have read that it is possible to have this code come in when the intake gasket is leaking? I know I read on post in there that it is an open circuit on the heater. I also have a 0171 code.
Anyway, I changed the intake manifold gasket since the car does have 349,000 km (216,000 miles) on it and it's a cheap and easy thing to do....Fel-Pro blue, not Toyota. I thought I would check the resistance of the O2 sensor.....which indicated 1.7 ohms. I took the reading with the sensor installed (only unplugged it and took the reading). The reading is not within 5-14 ohms which I saw stated in a post here.
I figured that a heater failure or open circuit would indicate an infinite resistance....and that my 1.7 ohms obtained would not bring in code 0031.
Unfortunately the car is not plated so I cannot just clear the codes and drive it for a while to see if the code(s) return.
Do you think my PO 0031/0171 issues should be resolved?
Thank you in advance.
Paul