Removal and Installation: Removal

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the battery or batteries. Refer to Battery Disconnect .
WARNING:
Battery acid and battery acid fumes are extremely dangerous and can cause severe burns and explosion. To help reduce the risk of personal injury;
- Wear appropriate goggles and protective clothing.
- Always properly ventilate the area where the service is being performed.
- Never allow battery fluid to come in contact with skin, eyes, fabrics or painted surfaces.
- To avoid arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.
- If acid contacts eyes, skin or clothing, immediately flush with water for 15 minutes and seek medical attention.
Remove the decomposition tube and SCR catalyst assembly. Refer to Removal and Installation .
Loosen retaining nuts and remove the exhaust gas temperature sensor probes (A)from the system. Note: Use caution when removing sensor probes. Do not bend the sensor probes upon removal or installation. If probes are bent, the life of the sensor may be shortened and there is a possibility of incorrect sensor readings. Replace bent sensor probes.

Courtesy of NISSAN NORTH AMERICA, INC.

WARNING: During regeneration, exhaust gas temperature can reach 800°C (1500°F), and exhaust system surface temperature can exceed 700°C (1300°F), which is hot enough to ignite or melt common materials, and to burn people. The exhaust and exhaust components can remain hot after the vehicle has stopped moving. To avoid the risk of fire, property damage, burns or other serious personal injury, allow the exhaust system to cool before beginning this procedure or repair and make sure that no combustible materials are located where they are likely to come in contact with hot exhaust or exhaust components.

CAUTION: Do not bend probes during removal. If probes are bent, the life of the probe may be shortened and there is a possibility of incorrect sensor readings. Replace bent probes.

NOTE: Record the locations where it was installed to make sure it is installed again in the same location.
Remove bolts and release clamps securing the SCR temperature sensor probe wires from the decomposition tube and SCR catalyst assembly and remove the SCR temperature sensor module.