Need more info, is this the 4 cylinder or 6 cylinder engine and which sensor on bank 1.
In the back end of the transmission.
That should be the sensor located after the catalytic converter.
Bank 1 sensor 3 would be the O2 sensor after the catalytic converter.
That would be the O2 sensor after the catalytic converter.
on the distributor @ 2 oclock
4.3L? Inside the distributor.
That should be the O2 sensor just before the catalytic converter.
Bank 1, on a 4.3 L engine would be on the drivers side.
Passenger side exhaust pipe directly after the exhaust manifold.
Assuming this is a V-6, bank 1 sensor 1 would be the first O2 sensor in the exhaust on the drivers side of the engine.
A 4WD on a 2001 Chevy S10 Blazer does not work properly after changing its actuator and speed sensor probably due to shorted wires. Also check for loose wiring.Ê
Bank 1 fuel too lean Probable causes: Vacuum leak at engine, bad intake gasket, exhaust leak before an o2 sensor, map sensor