P2D74

Battery Charging System Negative Contactor D Control Circuit Range/Performance

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Battery charging problems
Reduced engine power
Problems starting the engine
System transition to emergency mode

Causes

Negative contactor fault
Open or short circuit in control circuit
Problems with the charging control module
Corrosion of contacts or connectors
Faulty relays or fuses

How to Fix

Check the condition of the contactor and its connections
Check the integrity of the control circuit
Check charging system fuses and relays
Scan the control module for other errors
Repair only from an authorized dealer

Related codes

P2D73 P2D75 P0AA6