LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2018 >> QX30 Essential, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (3 Of 4) >> DTC/Circuit Diagnosis >> DTC P064D: ECM >> DTC Description >> DTC Detection Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Detection Logic

DTC No.

CONSULT screen terms

DTC detecting condition

DTC

(Trouble diagnosis content)

Malfunction type

P064D

04

CONTROL MODULE

(Internal control module O2 sensor processor performance bank 1)

SYSTEM INTERNAL MALFUNCTN

The processor of the oxygen sensor (cylinder bank 1) in the control unit has a malfunction. There is an internal malfunction.

84

SIG BELOW ALLOWABLE RANGE

The processor of the oxygen sensor (cylinder bank 1) in the control unit has a malfunction. There is a signal below the permissible limit value.

85

SIG ABOVE ALLOWABLE RANGE

The processor of the oxygen sensor (cylinder bank 1) in the control unit has a malfunction. There is a signal above the permissible limit value.

86

SIGNAL INVALID

The processor of the oxygen sensor (cylinder bank 1) in the control unit has a malfunction. There is an incorrect signal.