Catalyst, Selective Catalytic Reduction (SCR): Removal: Removal

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 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 negative battery cables.
Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
If equipped, remove skid plates.

Fig 1: Disconnecting/Connecting Front Exhaust Temperature Sensor Wire Harness Connector
Courtesy of CHRYSLER GROUP, LLC
Disconnect the front exhaust temperature sensors wire harness connector (1).

Fig 2: Ammonia Sensor Module, Nuts & Wire Harness Connectors
Courtesy of CHRYSLER GROUP, LLC
Disconnect the ammonia sensor wire harness connector (3).

Fig 3: Diesel Exhaust Fluid Supply Line & Injector Wire Harness Connector
Courtesy of CHRYSLER GROUP, LLC
Disconnect the Diesel Exhaust Fluid (DEF) injector wire harness connector (2).
Disconnect the DEF fluid supply line (1).
Disconnect the rear exhaust temperature sensors wire harness connector.
Remove bank 1/2 NOx sensors. Refer to SENSOR, NOX, REMOVAL .
Remove the tailpipe assembly. Refer to TAILPIPE, EXHAUST, REMOVAL .

Fig 4: Isolators, Flange Nuts & SCR
Courtesy of CHRYSLER GROUP, LLC
Saturate the DEF injector bolts and SCR flange nuts (3) with Mopar® Rust Inhibitor. Allow 5 minutes for penetration.
Remove SCR (2) from the isolators (1).
Remove nuts (3) and the SCR (2).
Remove and discard flange gaskets.