VOLVO DPF DELETE
Volvo D13 & Mack MP8 Engines Inlet NOx Sensor Replacement: Step by Step Guide

Volvo D13 & Mack MP8 Engines Inlet NOx Sensor Replacement: Step by Step Guide

This is a comprehensive guide on how to replace or delete the Inlet NOx sensor on Volvo D13 and Mack MP8 trucks. It outlines the step-by-step process, lists the tools needed, and describes how to help the DPF and emissions systems operate properly after the installation.

In this article, we’ll give you a detailed, step-by-step guide on how to replace or delete the Inlet NOx Sensor from the trucks having Volvo D13 and Mack MP8 Engines.

There is a couple of instruments You can use to execute this procedure: 

  • socket

  • wrench

  • wire cutter

  1. Remove the side Fairing Panel of the Truck. (See Figure 1)

Mechanic beside a green Volvo truck with its hood tilted forward and side fairing panel open in a workshop.
Figure 1

  1. Disconnect the NOx sensor module connector by pressing on the tab to get the connector out. (See Figure 2)

Gloved hand holding a disconnected electrical plug beside the NOx sensor module mounted behind the truck frame.
Figure 2

  1. Using the socket, remove the module mounting bolts located behind the inner fender. (See Figure 3 and 4)

Mechanic using a socket and extension to reach a NOx sensor module mounting fastener through a frame opening.
Figure 3
Ratchet and socket positioned on a mounting fastener beside the NOx sensor module, with its electrical socket exposed.
Figure 4

  1. Cut the NOx sensor wire ties. (See Figure 5)

Gloved hands using diagonal cutters to cut a cable tie securing the NOx sensor cable beside a mounting bracket.
Figure 5

  1. Remove the NOx sensor from the DPF Filter by means of a wrench. (See Figure 6)

Open-end wrench engaged with the hex fitting of a NOx sensor threaded into the exhaust housing.
Figure 6

  1. Install the new NOx sensor on to DPF filter and tighten it.

  2. Mount the NOx sensor module and connect the electrical connector. (See Figure 7)

NOx sensor module secured to a mounting plate, with a gloved hand holding an electrical connector beside its socket.
Figure 7

  1. Slightly pull back on the connector to make sure it is securely connected.

  2. Using zipties secure the NOx sensor wire to the mounting tabs.

  3. Make sure the NOx sensor wires will not rub on any sharp objects or touch the hot exhaust.

  4. Install the trucks fairing panel back. (See Figure 8)

Mechanic positioning the green side fairing and step assembly beneath a Volvo truck's cab door.
Figure 8
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