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Service bulletin WB13-85B

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10096330
Published by NHTSA2017-03-24
Manufacturer's numberWB13-85B
Manufacturer's date2014-01-23
NHTSA componentENGINE

NHTSA's summary

SOFTWARE UPDATES WITH ENHANCEMENTS ARE AVAILABLE FOR THE EMS AND AFTERTREATMENT CONTROL MODULE (ACM) FOR THE VEHICLES AFFECTED BY THE BULLETIN. SOFTWARE UPDATES ARE TO RESOLVE THE FOLLOWING DIAGNOSTIC TROUBLE CODES (DTC). • DTC P1086, OIL LEVEL MODERATELY LOW, LOW OIL LEVEL LIGHT COMING ON DURING START UP • DTC P0420, NOX CATALYST: MISSING SCR, CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD • DTC P205B, AFTERTREATMENT DIESEL EXHAUST FLUID (DEF) TANK TEMPERATURE SENSOR: RATIONALITY LOW • DTC P2002, PM FILTER EFFICIENCY MONITOR, AFTERTREATMENT DIESEL PARTICULATE FILTER (DPF) EFFICIENCY FAULT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Trouble codes named

P0420, P1086, P2002, P205B

Vehicles listed
VOLVO BUS 97002013 to 2014

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