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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 357 (Engine Control System (DTC/Circuit Diagnosis) (4 Of 17)) >> DTC/Circuit Diagnosis >> DTC P0128: Thermostat Function >> DTC Description >> Notes

DTC Description: Notes

WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long enough.

This is due to a leak in the seal or the thermostat being stuck open.