Engine Controls - Seized O2 Sensor Removal Procedure: Overview

Classification: EM09-015

Reference: NTB10-009

Date: January 19, 2010

REMOVAL PROCEDURE FOR SEIZED EXHAUST SENSOR

APPLIED VEHICLES: All Nissan vehicles

SERVICE INFORMATION

If an exhaust sensor is seized in the exhaust manifold/catalyst/front tube, perform the procedure described in this bulletin to remove the sensor and prevent unnecessary replacement of the exhaust manifold/catalyst/front tube.

In most cases this procedure is successful. This is because the threads of the exhaust sensors are made of a softer material than the part they thread into on the exhaust manifold/catalyst/front tube.

NOTE:
The replacement of exhaust manifolds/catalysts/front tubes for stripped exhaust sensor threads may not be considered a warrantable expense.

This procedure can be performed by two methods:

Method #1 - If the Sensor Can Be Easily Accessed

^ The procedure can be performed on the vehicle.

^ The exhaust manifold/catalyst/front tube will not have to be removed.

Method #2 - If the Sensor Cannot Be Easily Accessed

^ The exhaust manifold/catalyst/front tube must be removed from the vehicle.

^ The procedure will be performed with the part clamped in a vice.

Method #2 is described in this bulletin. Method #1 is the same as Method #2 except that it is performed on the vehicle.