2003 Infiniti QX4 4WDFACTORY OEM SERVICE PROCEDURE

Setting SRT Codes (Using CONSULT-II)

Perform DTC CONFIRMATION TEST under corresponding DTC test under DIAGNOSTIC TESTS. If more than on SRT item needs to be set, perform DTC confirmation tests in order of priority. See SYSTEM READINESS TEST PRIORITYΒ  table.

SYSTEM READINESS TEST PRIORITY

SRT Item (CONSULT-II Display) Priority Required Self-Diagnostic Items Corresponding DTC
CATALYST 3 3-Way Catalyst Function P0420, P0430
EVAP SYSTEM 2 (1) EVAP Control System P0442
EVAP SYSTEM 3 (2) EVAP Control System P0456/P1456
EVAP SYSTEM (3) 3 EVAP Control System P0441
HO2S 3 HO2S 1 P0134, P0154
HO2S 3 (4) HO2S 1 P0143, P0163
HO2S 3 (5) HO2S 1 P0144, P0164
HO2S 3 (6) HO2S 1 P1133, P1153
HO2S 3 (7) HO2S 1 P1132, P1152
HO2S 3 (8) HO2S 2 P0146, P0166
HO2S 3 (9) HO2S 2 P0147, P0167
HO2S 3 (10) HO2S 2 P1139, P1159
HO2S 3 (11) HO2S 2 P1138, P1158
HO2S HTR 3 HO2S 1 Heater P0031, P0032, P0051, P0052
HO2S HTR 3 HO2S 2 Heater P0037, P0038, P0057, P0058
(1) Small leak detected, negative pressure.
(2) Very small leak detected, negative or positive pressure.
(3) Purge flow monitoring.
(4) Lean shift monitoring.
(5) Rich shift monitoring.
(6) Response monitoring.
(7) High voltage.
(8) Minimum voltage monitoring.
(9) Maximum voltage monitoring.
(10) Response monitoring.
(11) High voltage.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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