Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2024 Infiniti QX55 EssentialFACTORY OEM SERVICE PROCEDURE
Security Control System
DTC Index
| DTC | Description |
|---|---|
| P161D-00 | IMMOBILIZER |
| P161E-00 | IMMOBILIZER |
| P161F-00 | IMMOBILIZER |
| B2190-00 | NATS ANTENNA AMP. |
| B2191-00 | DIFFERENCE OF KEY |
| B2196-00 | DONGLE UNIT |
| B2192-00 | ID DISCORD, BCM-ECM |
| B2193-00 | CHAIN OF BCM-ECM |
| B2195-00 | ANTI-SCANNING |
| B2198-00 | NATS ANTENNA AMP. |
| B2556-00 | PUSH-BUTTON IGNITION SWITCH |
| B2557-00 | VEHICLE SPEED |
| B2604-00 | SHIFT POSITION |
| B2608-00 | STARTER RELAY |
| B260F-00 | ENGINE STATUS |
| B261E-00 | VEHICLE TYPE |
| B26E3-00 | ELECTRIC SHIFT COMM FAIL |
| B26E4-00 | ELECTRIC SHIFT ID DISCORD |
| B26E5-00 | ELECTRIC SHIFT AUTH FAIL |
| B26E6-00 | ELECTRIC SHIFT ID REG FAIL |
| B26FC-00 | KEY REGISTRATION |
| B27D1-00 | START CUT RELAY OFF |
| B27D2-00 | START CUT RELAY ON |
Factory Service Tools
Use the Manual With the Right Hardware
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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.