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TSB Document:

Affected Component: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:CONDENSOR/EVAPORATOR

Summary
Some 2017-2021 Transit vehicles built on or before 30-Nov-2020 may experience a slow fill condition and/or illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0171, P0174, P0451, P0455, P0456, P0496 and/or P1450. This may be due to a kinked evaporator emissions fresh air vent line. To correct this condition, follow the Service Procedure to attach a zip tie to the fresh air vent line.

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Date Published
APR 08, 2021
NHTSA TSB #
10191172
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