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.
2018 Nissan-Datsun Sentra SLFACTORY OEM SERVICE PROCEDURE
Automatic HVAC Control System DTCS
AUTOMATIC HVAC CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| DTC | Description |
|---|---|
| DTC U1000 | CAN COMM CIRCUIT |
| DTC U1010 | CONTROL UNIT (CAN) |
| DTC B2578 | IN-VEHICLE SENSOR |
| DTC B2579 | IN-VEHICLE SENSOR |
| DTC B257B | AMBIENT SENSOR |
| DTC B257C | AMBIENT SENSOR |
| DTC B2581 | INTAKE SENSOR |
| DTC B2582 | INTAKE SENSOR |
| DTC B2630 | SUNLOAD SENSOR |
| DTC B2631 | SUNLOAD SENSOR |
| DTC B27A2 | AIR MIX DOOR MOTOR (DRIVER SIDE) |
| DTC B27A3 | AIR MIX DOOR MOTOR (DRIVER SIDE) |
| DTC B27A4 | AIR MIX DOOR MOTOR (DRIVER SIDE) |
| DTC B27A5 | AIR MIX DOOR MOTOR (DRIVER SIDE) |
| DTC B27AA | AIR MIX DOOR MOTOR (PASSENGER SIDE) |
| DTC B27AB | AIR MIX DOOR MOTOR (PASSENGER SIDE) |
| DTC B27AC | AIR MIX DOOR MOTOR (PASSENGER SIDE) |
| DTC B27AD | AIR MIX DOOR MOTOR (PASSENGER SIDE) |
| DTC B27A6 | MODE DOOR MOTOR |
| DTC B27A7 | MODE DOOR MOTOR |
| DTC B27A8 | MODE DOOR MOTOR |
| DTC B27A9 | MODE DOOR MOTOR |
| DTC B27A0 | INTAKE DOOR MOTOR |
| DTC B27A1 | INTAKE DOOR MOTOR |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.