LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2021 >> QX50 Essential, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (1 Of 5) >> DTC/Circuit Diagnosis >> DTC P0117, P0118: ECT Sensor >> DTC Description >> DTC Detection Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Detection Logic

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0117

00

ECT SEN/CIRC

(Engine coolant temperature sensor 1 circuit low)

Diagnosis condition

Ignition switch ON

Signal (terminal)

Engine coolant temperature sensor 1 signal

Threshold

An excessively low voltage from the sensor is sent to ECM

Diagnosis delay time

--

P0118

00

ECT SEN/CIRC

(Engine coolant temperature sensor 1 circuit high)

Diagnosis condition

Ignition switch ON

Signal (terminal)

Engine coolant temperature sensor 1 signal

Threshold

An excessively high voltage from the sensor is sent to ECM

Diagnosis delay time

--