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In front of and behind the catalytic converter.
One O2 sensor is on the manifold after the first catalytic converter and the other O2 is downstream behind the second catalytic converter (middle of vehicle body underneath).
One. The stock Geo Metro from 1995 and on consists of a catalytic converter a resonator and the muffler. In sure it holds true for the earlier models as well
try cleaning or replacing the cylanders
It is inside of the transmission.
It has 1 O2 sensor located on the exhaust manifold befor the catalytic converter
I have a 99 Metro 1.3L. This car has two oxygen sensors, one in the exhaust manifold and the other is after the Catalytic Converter. Hope that helps.
If you've got a lot of miles on that car, the most likely culprit is a clogged catalytic converter.
They have internal fuel filters..in the gas tank I believe. You pretty much have to take them to a mechanic
Had the same problem with my 96 Geo Metro........ I replaced the catalytic converter....... Real easy car to work on. Part was about $100 from www.rockauto.com heat up the bolts with some map gas and the bolts will come off
They are blue, black and white. They can be found extending from the catalytic converter (the upstream O2 sensor) and possibly from a second source (the downstream sensor).
Have a qualified mechanic check the gas tank vent pipe. It may be plugged ie. rust.