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.
2012 Infiniti QX56 RWDFACTORY OEM SERVICE PROCEDURE
Suspension Control System DTCS
AIR LEVELIZER CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC C1801 | VHCL HEIGHT SENSOR |
| DTC C1802 | AIR SUS COMPRS RELAY |
| DTC C1803 | AIR SUSPENSION EXH SOL |
| DTC C1804 | VHCL HEIGHT ADJ UP |
| DTC C1805 | VHCL HEIGHT ADJ DOWN |
| DTC C1806 | VHCL HEIGHT SEN FIX |
| DTC C1807 | VHCL HEIGHT SEN VOLT |
| DTC C1808 | AIR SUS COMPRS FNCTN |
| DTC U1000 | CAN COMM CIRCUIT |
| DTC U1010 | CONTROL UNIT (CAN) |
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.