P0A0B

High Voltage System Interlock Circuit A Performance

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Limitation of hybrid system operation
Possible problems with charging the high-voltage battery
Error message on the dashboard

Causes

Open or short circuit in the interlock circuit
Damaged or oxidized contacts in connectors
Malfunction of high voltage blocking sensors
Problems with high voltage relay
Malfunction of the high-voltage system control module

How to Fix

Visual inspection of interlock circuit wiring and connectors
Checking the integrity of the interlock circuit
Testing High Voltage Lockout Sensors
Diagnostics of the high-voltage system control module
Repair only from an authorized dealer

Related codes

P0A0A P0A0C P0A0D