very fast idle then stall

[ernie]

My daughter's 1996 Saturn sc single ohc. sometimes
revs up to 3000 rpm when stoping and then slows to
near stall or stalls. Auto zone read the codes as P0133
Oxygen sensor 1. Is there anything before this that might
cause this problem ?( before I change this sensor)
Ernie

 

[blah blah]

My daughter's 1996 Saturn sc single ohc. sometimes
revs up to 3000 rpm when stoping and then slows to
near stall or stalls. Auto zone read the codes as P0133
Oxygen sensor 1. Is there anything before this that might
cause this problem ?( before I change this sensor)
Ernie

Mileage, coolant last service when, plugs and wires last serviced when?

Possible probs, EGR, Coolant sensor, poor ignition system, bad O2.

 

[ernie]

150000 miles , coolant changed with water pump
2000 miles ago,plugs and wires 20000 miles ago.
O2 may be original
Ernie