U353A
High Voltage System Interlock Circuit M Performance
U353A is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit M Performance. Common causes: open circuit in hvil circuit, short circuit in hvil circuit. Estimated repair cost: $167–556.
Symptoms
- The Check Engine light comes on
- The car may go into emergency mode
- Engine power limitation
- Inability to start hybrid/electric system
Causes
- Open circuit in HVIL circuit
- Short circuit in HVIL circuit
- Damage to high voltage system connectors
- High voltage system controller malfunction
- Damage to the insulation of high-voltage wires
How to Fix
- Visual inspection of high voltage connections
- HVIL Circuit Continuity Test
- Diagnostics of high-voltage system connectors
- Checking the insulation resistance of high voltage components
- Repair only from an authorized dealer
Related codes
Error U353A by Vehicle Brand
FAQ
What does the U353A code mean?
U353A is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit M Performance
What causes a U353A error code?
The most common causes of U353A include: Open circuit in HVIL circuit; Short circuit in HVIL circuit; Damage to high voltage system connectors; High voltage system controller malfunction.
How do I fix a U353A diagnostic trouble code?
To fix U353A: Visual inspection of high voltage connections. HVIL Circuit Continuity Test. Diagnostics of high-voltage system connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U353A?
Do not drive — repair immediately
How much does it cost to fix U353A?
The estimated repair cost for U353A is $167–556. Actual cost depends on your vehicle, location, and labor rates.
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