Coolant level sensor, replacement
Mack technical service bulletin FSB 386-009 for 2009-2016 Mack Mru, 2015-2016 Mack LR and 2009-2016 Mack Leu.
- Bulletin number
- FSB 386-009
- Component
- Engine and engine cooling
- Summary
- Coolant level sensor, replacement. The coolant level sensor (part number 21257608) on some mack cabover trucks built between 10/04/2008 and 02/20/2015 may fail internally. Failure of the sensor can cause the malfunction indicator light (mil) to illuminate and can cause an unplanned stop in cases where the engine parameter "engine shutdown with low coolant" is enabled.
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