NHTSA campaign 18V124000
Hazard
Navistar, Inc. (Navistar) is recalling certain 2016-2019 IC bus CE school buses equipped with 8.8L liquid propane gas (LPG) engines. The LPDM relay for the propane booster pump and the scavenge pump may intermittently fail, causing the fuel pump to stop.
Consequence
If the fuel pump stops, the bus will stall, increasing the risk of a crash.
Remedy
Navistar will notify owners, and dealers will replace the LPDM relay, free of charge. The recall began on April 12, 2018. Owners may contact Navistar customer service at 1-800-448-7825. Navistar's number for this recall is 18501.
The text above is quoted verbatim from the NHTSA record. Confirm the affected units and the remedy with the manufacturer or NHTSA. Recall data may be incomplete, delayed, or superseded.