U353C
High Voltage System Interlock Circuit M High
U353C is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit M High. Common causes: broken wire in the interlock circuit, damaged or oxidized contacts. Estimated repair cost: $17–89.
Symptoms
- Check Engine light comes on
- Engine power limitation
- Inability to start the high voltage system
- Error message on the dashboard
- Problems with charging a high-voltage battery
Causes
- Broken wire in the interlock circuit
- Damaged or oxidized contacts
- Malfunction of the high voltage system connector
- Problems with the high voltage system control unit
- Mechanical damage to the wiring harness
How to Fix
- Check the integrity of the locking circuit
- Inspect connectors and contacts for damage
- Check the resistance in the circuit
- Replace damaged wires or connectors
- Repair only from an authorized dealer
Related codes
Error U353C by Vehicle Brand
FAQ
What does the U353C code mean?
U353C is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit M High
What causes a U353C error code?
The most common causes of U353C include: Broken wire in the interlock circuit; Damaged or oxidized contacts; Malfunction of the high voltage system connector; Problems with the high voltage system control unit.
How do I fix a U353C diagnostic trouble code?
To fix U353C: Check the integrity of the locking circuit. Inspect connectors and contacts for damage. Check the resistance in the circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U353C?
Yes, but get it checked soon
How much does it cost to fix U353C?
The estimated repair cost for U353C is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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