Service bulletin T2035C

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

NHTSA's summary

This field action authorizes certified repair locations to upfit certain ISX15 CM2250 engines rated at 450hp or less with an improved Selective Catalytic Reduction (SCR) Catalyst, if the engine meets certain criteria including at least one of the identified fault codes: an active count of fault code 3151 (SCR Catalyst System Missing) or fault code 3582 (SCR Conversion Efficiency), or more than one inactive count within the last 250 engine operating hours, and must be less than 435K miles. This is an update to a previously submitted communication.

The document

• NHTSA's copy of the document (PDF)
• If that address does not open, try this one

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Exhaust and emissions, Catalytic converter

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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