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Home >> Infiniti >> 2023 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (1 Of 5) >> Engine (ECM) >> DTC P00B3: Engine Coolant Temperature Sensor 2 >> DTC Description >> DTC Detection Logic
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DTC Detection Logic

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible Cause

P00B3

RADIATOR COOLANT TEMP SEN

(Radiator coolant temperature sensor circuit low)

ECM detects the following status continuously for 5 seconds or more:

A voltage signal transmitted from the engine coolant temperature sensor 2 is 0.04 V or less.

  • Harness or connectors

    (Engine coolant temperature sensor 2 circuit is open or shorted.)

  • Engine coolant temperature sensor 2

P00B4

RADIATOR COOLANT TEMP SEN

(Radiator coolant temperature sensor circuit high)

ECM detects the following status continuously for 5 seconds or more:

A voltage signal transmitted from the engine coolant temperature sensor 2 is 4.84 V or more.