P2D66

Battery Charging System Negative Contactor C Control Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–111 (est.)

Symptoms

Check Engine Light Is On
Battery charging problems
Reduced electrical system performance
Possible problems starting the engine

Causes

Negative contactor fault
Problems in the contactor control circuit
Control unit malfunction
Poor contacts or corrosion in connectors
Open or short circuit in wiring harness

How to Fix

Check the condition of the negative contactor
Check the integrity of the control circuit
Check connectors and connections for corrosion
Scan the control unit for additional errors
If necessary, replace the negative contactor

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