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.
Expansion Valves
2012 Nissan-Datsun Sentra SE-RSECTION Expansion Valves
NOTE:
Expansion valves indicated for use on R134a systems are acceptable for R12 systems.
| Condition | Code | Procedure |
|---|---|---|
| Application incorrect | B | Require replacement |
| Attaching hardware broken | A | Require repair or replacement of hardware |
| Attaching hardware missing | C | Require replacement of hardware |
| Attaching hardware not functioning | A | Require repair or replacement of hardware |
| Corroded internally | 1 | Suggest replacement |
| Filter screen torn | A | Require replacement of screen |
| Inoperative | A | Require repair or replacement |
|
NOTE:
Expansion valve operation may be affected by capillary tube location, corrosion, and insulation tape. Inoperative includes intermittent operation.
|
||
| Leaking | B | Require replacement |
| Restricted | A | Require repair or replacement |
| Threads damaged | A | Require repair or replacement |
| Threads stripped (threads missing) | A | Require replacement |
RENDER: 1.0x
NO RELATED
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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.