U3527
High Voltage System Interlock Circuit G Low
U3527 is an OBD-II diagnostic trouble code meaning: High Voltage System Interlock Circuit G Low. Common causes: broken or damaged wiring in the interlock circuit, poor contact in high voltage system connectors. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Possible problems starting the hybrid system
- Reducing power or shutting down the high voltage system
- Warning messages appear on the dashboard
Causes
- Broken or damaged wiring in the interlock circuit
- Poor contact in high voltage system connectors
- Malfunction of the high-voltage system blocking sensor
- Problems with the high voltage system control module
- Short circuit in the circuit
How to Fix
- Check the integrity of the wiring in the blocking circuit
- Inspect and clean the contacts in the system connectors
- Check the functionality of the lock sensor
- Scan the control module for additional errors
- Repair only from an authorized dealer
Related codes
Error U3527 by Vehicle Brand
FAQ
What does the U3527 code mean?
U3527 is an OBD-II diagnostic trouble code that indicates: High Voltage System Interlock Circuit G Low
What causes a U3527 error code?
The most common causes of U3527 include: Broken or damaged wiring in the interlock circuit; Poor contact in high voltage system connectors; Malfunction of the high-voltage system blocking sensor; Problems with the high voltage system control module.
How do I fix a U3527 diagnostic trouble code?
To fix U3527: Check the integrity of the wiring in the blocking circuit. Inspect and clean the contacts in the system connectors. Check the functionality of the lock sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3527?
Do not drive — repair immediately
How much does it cost to fix U3527?
The estimated repair cost for U3527 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat