Issue
Hazard description
On certain vehicles built on FCCC XC motorhome chassis, in a situation where multiple alarms are active, a Check Engine, Stop Engine, or similar warning indicator is given priority over the Low Air alarm by the instrument system controller software. If the operator does not acknowledge these higher priority alarms a Low Air alarm may not be displayed. This is a non-compliance with the low air warning requirements of CMVSS 121. Correction: Dealers will reprogram the Multi-Module Data Controller (MMDC).
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