U352A
High Voltage System Interlock Circuit H Performance
U352A is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit H Performance. Common causes: broken or damaged hvil circuit wires, oxidation of contacts in connectors. Estimated repair cost: $56–278.
Symptoms
- The malfunction indicator on the dashboard lights up
- Reduced power or complete loss of traction
- Inability to start the engine (in hybrid systems)
- Error message on display
- High voltage system failure
Causes
- Broken or damaged HVIL circuit wires
- Oxidation of contacts in connectors
- Malfunction of one of the circuit limit switches
- Wiring harness damage
- Problems with the high voltage system control unit
How to Fix
- Visual inspection of HVIL circuit wiring and connectors
- Checking continuity with a multimeter
- Cleaning contacts in connectors
- Replacing damaged wiring sections
- Diagnosis and replacement of faulty circuit components
- Repair only from an authorized dealer
Related codes
Error U352A by Vehicle Brand
FAQ
What does the U352A code mean?
U352A is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit H Performance
What causes a U352A error code?
The most common causes of U352A include: Broken or damaged HVIL circuit wires; Oxidation of contacts in connectors; Malfunction of one of the circuit limit switches; Wiring harness damage.
How do I fix a U352A diagnostic trouble code?
To fix U352A: Visual inspection of HVIL circuit wiring and connectors. Checking continuity with a multimeter. Cleaning contacts in connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U352A?
Do not drive — repair immediately
How much does it cost to fix U352A?
The estimated repair cost for U352A is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat