P0AD9

Hybrid/EV Battery Positive Contactor Control Circuit/Open

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Hybrid/electric system does not activate
Check Engine light comes on
Decreased power or inability to move
Error message on the dashboard
The car goes into emergency mode

Causes

Open circuit in the contactor control circuit
Battery positive contactor fault
Problems with the Battery Management Module (BMS)
Corrosion or poor contact in connectors
Damage to the high voltage system wiring harness

How to Fix

Check the integrity of the contactor control circuit
Test the resistance and operation of the contactor
Inspect and clean all contacts and connectors
Check error codes in the BMS module
Replace faulty contactor or repair wiring

Related codes

P0ADA P0ADB P0A8F