LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2019 >> QX50 Essential, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (7 Of 12) >> DTC/Circuit Diagnosis >> DTC P1148: Closed Loop Control >> 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

P1148

00

CLOSED LOOP-B1

(Closed loop --b1)

Diagnosis condition

--

Signal (terminal)

--

Threshold

The closed loop control function does not operate even when vehicle is being driven in the specified condition

Diagnosis delay time

--