Knock Sensor: Removing

WARNING: This page is about a different car, the 2014 Volkswagen Routan, 2013 Volkswagen Routan, 2012 Volkswagen Routan, and 2011 Volkswagen Routan. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Knock Sensors

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

The forward sensor (1) is known to the powertrain control module (PCM) as knock sensor 1. The rear sensor (3) is known to the PCM as knock sensor 2.

-- Perform the fuel pressure release procedure. Refer to FUEL SYSTEM PRESSURE RELEASE PROCEDURE .

-- Disconnect the negative battery. Refer to Battery, Disconnecting And Connecting .

-- Drain the cooling system. Refer to COOLING SYSTEM DRAINING AND FILLING .

-- Remove the air cleaner housing assembly, upper and lower intake manifolds and the oil filter housing. Refer to LOWER INTAKE MANIFOLD .

-- Remove the electrical connector (4).

NOTE:

There may be a foam strip on the bolt threads. This foam is used only to retain the bolts to the sensors for plant assembly. It is not used as a sealant. Do not apply any adhesive, sealant or thread locking compound to these bolts.

-- Remove the mounting bolt (2) and knock sensor 1 (1) or knock sensor 2 (3).