Lambda Oxygen Sensor - Contamination

ITEM: J81/14

SUBJECT:
Lambda Oxygen Sensor Contamination

MODEL:
All Fuel Injected Vehicles

Dealers should be aware of the possibility of damage to the Lambda Oxygen Sensor by the high lead content of some brands of proprietary anti-seize pastes.

Lead free anti-seize paste such as "Never-Seize" should be applied sparingly to the threaded portion of the sensor. Liquid or aerosol spray type mixtures must not be used.

Recent industry tests also indicate that silicone sprays such as belt dressings and waterproofing sprays can contaminate the Lambda sensor and destray the voltage signal. For this reason, spraying under the hood with silicone sprays must be avoided.

H.C.T.