The '97 is OBDII. There are 4 different O2 sensors on the '97 Cadillac. http://www.airbagcrash.com
On a 1993 Cadillac Eldorado, the oxygen (O2) sensor is typically located in the exhaust system. For this model, you can find it either in the exhaust manifold or in the exhaust pipe downstream of the catalytic converter. Depending on the specific engine configuration, there may be one or two O2 sensors. To access it, you may need to lift the vehicle for better visibility and reach.
On a 2000 Cadillac Eldorado, the O2 sensors are typically located in the exhaust system. There are usually two sensors: one is positioned before the catalytic converter (upstream O2 sensor) and the other is after the catalytic converter (downstream O2 sensor). You can find them on the exhaust pipes, near the engine and the catalytic converter. For specific locations, it's best to refer to a repair manual or service guide for detailed diagrams.
The O2 sensor on a 2003 Cadillac Northstar engine is located in the exhaust manifold. The readings from this sensor are sent to the vehicle's computer, which makes constant adjustments to the fuel and air mixture.
Heated Oxygen Sensor Control Circuit Bank1 Sensor2symptomsOther than the MIL light illuminating you may not notice any performance issues.causeA short in the O2 sensor heater circuit or the sensor itselfA faulty O2 sensor heaterWiring or connectors are broken or frayed to the sensor or relayBad PCM or ECMThe fixCorrect wiring short or loose connector found in inspection.and/orReplace the bank 1 sensor 2, O2 sensor
I believe the O2 sensor heater is a fused circuit, you will need a wiring diagram to tell which one it is.
Before the Cat Conv
There isn't one.
o2 sensor is on driver side 2nd one back
There isn't one.
To replace the O2 sensor on a 1997 Cadillac Seville STS, first, ensure the vehicle is cool and disconnect the negative battery cable. Locate the O2 sensor, which is typically found on the exhaust manifold or downstream in the exhaust system. Use a wrench or O2 sensor socket to unscrew the old sensor, then install the new one, ensuring it’s tightened securely. Finally, reconnect the battery and check for any error codes or leaks.
Cadillac DeVillethese o2 sensors are located aft of the cat that is o2 #2 ,o2 #1 is forward of the cat this is the same on all OBDII compliant auto's Fred@towerpower6@bigriver.net