P2D63

Battery Charging System Negative Contactor C Stuck Closed

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$28–89 (est.)

Symptoms

Constant battery drain
Inability to start the engine
Check engine light is on
Reduced hybrid system efficiency (if applicable)

Causes

Mechanical contactor sticking
Control relay fault
Open or short circuit in control circuit
Problems with the charging system control unit
Contact corrosion

How to Fix

Check the condition of contactor C visually and mechanically
Test contactor control circuit
Check the operation of the control relay
Scan the control unit for additional errors
Replace faulty contactor or relay

Related codes

P2D62 P2D64 P0AA6