U353D: The high voltage system interlock circuit N is not working properly
The high voltage system interlock circuit N is not working properly. It is usually a high voltage connector that is not properly closed, or its wiring. It is high voltage, have it checked by a qualified workshop.
| Code | U353D |
|---|---|
| System | Communication network |
| Group | U35xx, Communication network |
| Type | Generic: it means the same on every make |
How to read and clear U353D with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see U353D with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- U3539 The high voltage system interlock circuit M is not working properly
- U353A The high voltage system interlock circuit M gives readings outside the normal
- U353B The high voltage system interlock circuit M gives a lower signal than normal
- U353C The high voltage system interlock circuit M gives a higher signal than normal
- U353E The high voltage system interlock circuit N gives readings outside the normal
- U353F The high voltage system interlock circuit N gives a lower signal than normal
- U3540 The high voltage system interlock circuit N gives a higher signal than normal
- U3541 The high voltage system interlock circuit O is not working properly
What does code U353D mean?
The high voltage system interlock circuit N is not working properly. It is usually a high voltage connector that is not properly closed, or its wiring. It is high voltage, have it checked by a qualified workshop.
How do you clear U353D?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, U353D comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
