U3533
High Voltage System Interlock Circuit K Low
U3533 is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit K Low. Common causes: open circuit in high voltage blocking circuit, short circuit to ground. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced power or inability to start the engine
- Error message on the dashboard
- Disabling the High Voltage System
- Problems with charging a high-voltage battery
Causes
- Open circuit in high voltage blocking circuit
- Short circuit to ground
- Lock sensor malfunction
- Wiring harness damage
- Problems with the high voltage system control module
How to Fix
- Check the integrity of the high voltage blocking circuit
- Inspect connectors and wiring harness for damage
- Check high voltage lockout sensor
- Scan the high voltage system control module for errors
- Repair only from an authorized dealer
Related codes
Error U3533 by Vehicle Brand
FAQ
What does the U3533 code mean?
U3533 is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit K Low
What causes a U3533 error code?
The most common causes of U3533 include: Open circuit in high voltage blocking circuit; Short circuit to ground; Lock sensor malfunction; Wiring harness damage.
How do I fix a U3533 diagnostic trouble code?
To fix U3533: Check the integrity of the high voltage blocking circuit. Inspect connectors and wiring harness for damage. Check high voltage lockout sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3533?
Do not drive — repair immediately
How much does it cost to fix U3533?
The estimated repair cost for U3533 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat