After Treatment Disconnected

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.

WARNING: Exhaust system components can become hot enough during operation and testing to cause burns or ignite and melt combustible materials. The exhaust and exhaust components can remain hot after the vehicle stops moving and has been shut down. To avoid the risk of fire, property damage, burns or other serious personal injury, allow the exhaust system to cool before beginning repairs or service. Make sure that no combustible materials are located where they are likely to come in contact with hot exhaust or exhaust components.

Remove the diesel oxidation catalyst diesel particulate filter (DOC DPF) assembly. Refer to Removal and Installation .
Place vehicle transmission in N (Neutral) and apply the parking brake.
Start and idle the engine.
Quickly depress the accelerator pedal from 0-100%. Hold for 5 seconds and then release. This can be performed multiple times, if necessary.
Check for black smoke exiting the turbocharger turbine outlet as the engine is accelerated from low idle to high idle and at high idle.
- A small puff of black smoke upon acceleration that clears at a steady high idle speed is normal.
- White smoke during the Snap Acceleration Test does not indicate a malfunction.
- Heavy black smoke indicates other upstream engine issues that need to be diagnosed.
Connect the diesel oxidation catalyst diesel particulate filter (DOC DPF) assembly. Refer to Removal and Installation .
Inspect the exhaust piping for leaks, cracks, and loose connections.
Perform the After treatment DPF Regeneration. Refer to After treatment DPF Regeneration Test .
Check for current DTCs and/or engine indicator lamps for high after treatment diesel particulate soot load. If any current DTCs are present. Refer to DTC Index .