TSB Document:

Affected Component: POWER TRAIN

Summary
Certain 2019MY Nexo vehicles may illuminate a check engine light due to a powertrain related DTC P1D3D94 (Coolant Stack Pump – Motor or Internal Controller Malfunction) resulting in reduced engine power due to cracking in the stack coolant pump rotor molding. This bulletin provides replacement procedures related to the stack coolant pump.

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Date Published
SEP 14, 2021
NHTSA TSB #
10202182
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