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Service bulletin SB-20-9

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 id10045180
Published by NHTSA2012-08-22
Manufacturer's numberSB-20-9
Manufacturer's date2012-07-01
NHTSA componentENGINE

NHTSA's summary

THOMAS BUILT BUSES: GENTECH LOW COOLANT LEVEL SENSORS, WITH MOUNTED SURGE TANKS, ARE MISDIAGNOSED DUE TO FAULT CODE DURING TEMPORARY LOW COOLANT LEVEL IN SURGE TANK DURING ENGINE WARM UP. *PE

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

Vehicles listed
THOMAS BUILT SAF-T-LINER C22010 to 2011
THOMAS BUILT BUSES SAF-T-LINER C22010 to 2013

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