Disclaimer2020 Porsche Boxster S (986) F6-3.2L Technical Service Bulletin # 9902 Date: 991023
Oxygen Sensor - Proper Care of Connections
Boxster
9902 2469
Binder - 2, Exhaust
10-23-99
Oxygen Sensor Connections
Vehicle Type:
Boxster, Boxster S
Model Year:
As of 1997 (V)
2020 Porsche Boxster S (986) F6-3.2L Page 35
Concern:
Proper care of oxygen sensor connections
Information:
Oxygen sensors perform their function by creating a signal voltage that is based on the comparison of air content in the exhaust system to that of a
known good air reference (ambient oxygen). Since 1989, the oxygen sensors on Porsche cars have been said to be 'submersible". This means that
the sampling of reference oxygen is taken from the oxygen sensor connector in the engine compartment, as opposed to the oxygen sensor housing
area (in prior configurations). Taking reference air from the connector results in more accurate sensor readings, because the oxygen sensor
connector is less likely to be affected by moisture or foreign substances.
Although "submersible" oxygen sensors are basically impervious to substances at the sensor, they can be permanently damaged if any foreign
substance is sprayed or otherwise applied to the oxygen sensor connector (or signal wire). To function properly, reference air must be allowed to
pass through the connector, down the signal wire (within the insulation), and to the sensor.
Therefore, it is extremely important that the oxygen sensor connectors be clean and dry at all times. Contact cleaners, contact enhancers (such as
Stabilant 22A), oil or water based sprays, and even die - electric compounds MUST BE KEPT AWAY from the oxygen sensor connections, or
permanent SENSOR DAMAGE will result!
Always clean oxygen sensor contacts in a dry fashion, being careful not to allow any type of substance or debris into the connectors.
Note:
The connections at the oxygen sensor can often be improved by simply unplugging and replugging the connector several times.
Important!
Oxygen sensors damaged by the application of any foreign substance in the connector area will not be considered a warranty matter.
Please inform all service personnel immediately.