1999 Infiniti Q45 BaseFACTORY OEM SERVICE PROCEDURE

Setting SRT Codes

To set all SRT codes as complete, self diagnosis for the items specified must be performed one or more times. See appropriate SYSTEM READINESS TEST (SRT) CODE IDENTIFICATION table. With scan tool connected to Data Link Connector (DLC), start engine and allow vehicle to warm to operating temperature and coolant temperature greater than 158°F (70°C). Drive vehicle according to procedure shown in illustration. See Fig 1. Perform driving procedure one or more times. If driving procedure is interrupted, repeat procedure. On A/T models, operate vehicle with shift lever in "D" position and overdrive ON. On M/T models, shift gears at suggested speeds. See SUGGESTED SHIFT SPEEDS (M/T)  table. DO NOT exceed maximum suggested speed in any gear. See MAXIMUM SPEED FOR EACH GEAR  table.

Fig 1: Setting System Readiness Test (SRT) Codes
G98C01294Courtesy of NISSAN MOTOR CO., U.S.A.
SUGGESTED SHIFT SPEEDS (M/T)

Gear Change Shift Speed (MPH)
1st To 2nd 15
2nd To 3rd 25
3rd To 4th 40
4th To 5th 45
MAXIMUM SPEED FOR EACH GEAR

Gear Speed (MPH)
1st 35
2nd 60
3rd 85
SYSTEM READINESS TEST (SRT) CODE IDENTIFICATION (G20)

Category/System Monitored DTC/(1) MIL Code
Catalyst System
Three Way Catalyst P0420/0702
EVAP System
EVAP Control System
Small Leak - Negative Pressure P0440/0705
Small Leak - Positive Pressure P1440/0213
Purge Flow P1447/0111
HO2S Sensor
Front HO2S
Circuit P0130/0303
Lean Shift P0131/0411
Rich Shift P0132/0410
Response P0133/0409
High Voltage P0134/0412
Rear HO2S
Minimum Voltage P0137/0511
Maximum Voltage P0138/0510
Response P0139/0707
High Voltage P0140/0512
HO2S Sensor Heater System
Front P0135/0901
Rear P0141/0902
EGR System
EGR Function
Closed P0400/0302
Open P1402/0514
EGRC-BPT Valve Function P0402/0306
(1) Malfunction Indicator Light (MIL) fault codes. See ENTERING SELF-DIAGNOSTICS.
SYSTEM READINESS TEST (SRT) CODE IDENTIFICATION (I30)

Category/System Monitored DTC/(1) MIL Code
Catalyst System
Three Way Catalyst P0420/0702
EVAP System
EVAP Control System
Small Leak - Negative Pressure P0440/0705
Small Leak - Positive Pressure P1440/0213
Purge Flow P1447/0111
HO2S Sensor
Front HO2S
Circuit P0130/0503 & P0150/0303
Lean Shift P0131/0411 & P0151/0415
Rich Shift P0132/0410 & P0152/0414
Response P0133/0409 & P0153/0413
High Voltage P0134/0412 & P0154/0509
Rear HO2S
Minimum Voltage P0137/0511
Maximum Voltage P0138/0510
Response P0139/0707
High Voltage P0140/0512 & P0160/0315
HO2S Sensor Heater System
Front P0135/0901 & P0155/1001
Rear P0141/0902 & P0161/1002
EGR System
EGR Function
Closed P0400/0302
Open P1402/0514
(1) Malfunction Indicator Light (MIL) fault codes. See ENTERING SELF-DIAGNOSTICS.
SYSTEM READINESS TEST (SRT) CODE IDENTIFICATION (Q45)

System Monitored/Component DTC/(1) MIL Code
Catalyst System
Three Way Catalyst
Left Bank P0420/0702
Right Bank P0430/0703
EVAP System
EVAP Control System
Small Leak - Negative Pressure P0440/0705
Small Leak - Positive Pressure P1440/0213
Purge Flow P1447/0111
HO2S Sensor
Left Front HO2S
Circuit P0130/0303
Lean Shift P0131/0411
Rich Shift P0132/0410
Response P0133/0409
High Voltage P0134/0412
Right Front HO2S
Circuit P0150/0503
Lean Shift P0151/0415
Rich Shift P0152/0414
Response P0153/0413
High Voltage P0154/0509
Left Rear HO2S
Minimum Voltage P0137/0511
Maximum Voltage P0138/0510
Response P0139/0707
High Voltage P0140/0512
Right Rear HO2S
Minimum Voltage P0157/0314
Maximum Voltage P0158/0313
Response P0159/0708
High Voltage P0160/0315
HO2S Sensor Heater System
Right Side
Front P0135/0901
Rear P0141/0902
Left Side
Front P0155/1001
Rear P0161/1002
EGR System
EGR Function
Closed P0400/0302
Open P1402/0514
EGRC-BPT Valve Function P0402/0306
(1) Malfunction Indicator Light (MIL) fault codes. See ENTERING SELF-DIAGNOSTICS.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

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

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

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.