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That would depend on the size of the engine as well as if you are looking to replace the upstream sensor or downstream. Upstream simply means its in the exhaust system BEFORE the catalytic converter while downstream means that it is located after the converter. You need to have someone pull the DTC's, diagnostic trouble codes, from the ECM before you start replacing sensors. The code(s) you pull from that should point you in the right direction to which sensor is giving you a SES light or Check Engine light. I just recently pulled code P0420 on a 2000 Alero with the Quad4 engine. The code simply stated that the output on sensor 1 bank 1 was below threshold. I replaced the sensor and now everything is kosher. Some instances arent that lucky. Good luck with whatever you determine the cause is.
Dale
What else can I help you with?
Where is the o2 sensor upstream on a 2004 Oldsmobile alero 2.2 liter?
On a 2004 Oldsmobile Alero with a 2.2-liter engine, the upstream O2 sensor is located in the exhaust manifold, before the catalytic converter. It is typically found on the exhaust pipe just after the engine's exhaust ports. This sensor monitors the oxygen levels in the exhaust gases to help optimize fuel efficiency and emissions.
Where is the coolant sensor on a Oldsmobile Alero located?
beside thermostat
Where is the o2 sensor on an 1998 Oldsmobile Achieva?
the O2 Sensor Should be on top of your exhaust manifold
O2 sensor location on 2000 Oldsmobile intrigue?
1st o2 senor is between exhaust. 2nd o2 sensor is under shifter
Where is the speed sensor on an 2000 Oldsmobile alero?
its mounted on the transaxle under the car
How do you change the rear oxygen sensor on a 2003 Oldsmobile Alero?
Go to AutoZone to borrow the tool and purchase a Bosch O2 sensor - the rep can identify the model number you need and show you on a diagram where the sensor is located under the car. The job is very easy and can be accomplished in an hour.
Knock sensor location for 99 alero?
On a 1999 Oldsmobile Alero, the knock sensor is located on the engine block. It may be bolted to the intake manifold, or to either side of the block.
What Would cause sluggish on a 2001 alero?
one of two things, the upper o2 sensor or the camshaft position sensor
Crankshaft position sensor on a Oldsmobile alero?
it is right above the oill filter just to the left
Dash lights on Oldsmobile alero?
brake light on when driving oldsmobile alero
Where is charging port Oldsmobile alero?
Where is the charging port for the a/c in a Oldsmobile alero
What would cause the traction control to turn off on an 2001 Oldsmobile alero?
a bad sensor. the alero is notorius for many bad sensors. not an expensive replacement though
