Catalyst, Selective Catalytic Reduction (SCR): Removal

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

If torches are used when servicing the exhaust system, do not allow any flame near the fuel lines or the fuel tank. Failure to follow these instructions may result in possible serious or fatal injury.

Disconnect and isolate both of the negative battery cables.
Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
If equipped, remove the skid plates.

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Disconnect the exhaust temperature sensors wire harness connector (1).

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Disconnect the Diesel Exhaust Fluid (DEF) injector wire harness connector (2).
Disconnect the DEF fluid supply line (1).

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Disconnect the exhaust temperature sensors wire harness connector (1).
Remove the NOx sensors 1/2. Refer to SENSOR, NOX, REMOVAL .
Remove the Particulate Matter (PM) sensor. Refer to SENSOR, PARTICULATE MATTER, REMOVAL .
Remove the tailpipe assembly. Refer to TAILPIPE, EXHAUST, REMOVAL .

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Saturate the DEF injector bolts and SCR flange nuts (3) with Moper® Rust Inhibitor. Allow 5 minutes for penetration.
Remove the SCR (2) from the isolators (1).
Remove the nuts (3) and the SCR (2).
Remove and discard the flange gaskets.