LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2021 >> QX50 Essential, 4WD >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> Shift (Electric Shift Control Module) >> DTC P18A8-00: P Range Switch >> 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

P18A8

00

P range switch

(P Position Switch Error)

1

Diagnosis condition

When the Ignition switch is ON

Signal (terminal)

P position switch No. 1 and No. 2 signal

Threshold

P position switches No. 1 and No. 2 are stuck at ON or OFF.

Diagnosis delay time

--

2

Diagnosis condition

When the Ignition switch is ON

Signal (terminal)

P position switch No. 1 and No. 2 signal

Threshold

P position switch No. 1 is stuck at ON and P position switch No. 2 is stuck at OFF.

Diagnosis delay time

--

P position switch

P position switch

No. 1

No. 2

Press

ON

OFF

No press

OFF

ON