Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSOLDSMOBILE1998EIGHTY-EIGHT V6-3.8L VIN KREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORAPPLICATION AND ID
1998 Oldsmobile Eighty-Eight V6-3.8L VIN K
Oxygen Sensor: Application and ID
1998 Oldsmobile Eighty-Eight V6-3.8L VIN KSECTION Application and ID
*** THIS ARTICLE INCLUDES UPDATES MADE BY TSB # 67-65-40, DATED MARCH, 1997 ***
Oxygen Sensor Designations
There has been some confusion relative to OBD II oxygen sensor designation. The intent of this article is to eliminate misdiagnosis of those oxygen sensors due to misidentification.
For "V" engines; BANK 1 is always on the side of the engine with the number 1 cylinder (odd cylinders), and BANK 2 is always on the side of the engine where the number 2 cylinder (even cylinders) is located (see image).
Pre and Post Sensors
The pre-sensor is the sensor just in front of the catalytic converter. The post sensor is the sensor behind the catalytic converter.
Oxygen Sensor Designations
There has been some confusion relative to OBD II oxygen sensor designation. The intent of this article is to eliminate misdiagnosis of those oxygen sensors due to misidentification.
For "V" engines; BANK 1 is always on the side of the engine with the number 1 cylinder (odd cylinders), and BANK 2 is always on the side of the engine where the number 2 cylinder (even cylinders) is located (see image).
Pre and Post Sensors
The pre-sensor is the sensor just in front of the catalytic converter. The post sensor is the sensor behind the catalytic converter.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.