Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's battery system has a part that is supposed to close to let electricity flow, but it's stuck open, so the electricity can't get through.
The code indicates that the negative contactor in the battery charging system is not closing as it should, preventing the proper flow of electricity.
The P2D72 code is triggered when the vehicle's onboard diagnostic system detects that the negative contactor (D) in the battery charging system is stuck in the open position. This prevents the battery from being properly charged as the circuit remains incomplete.
• Battery not charging
• Warning light on dashboard
• Reduced vehicle performance
• Faulty negative contactor
• Electrical wiring issues
• Malfunctioning control module
Contactor: A switch used to control large amounts of electrical power.
OBD-II: On-Board Diagnostics, a standardized system for vehicle self-diagnostics.
• Use an OBD-II scanner to confirm the code.
• Inspect the negative contactor for physical damage.
• Check the wiring and connections for continuity.
• Replace the faulty negative contactor.
• Repair or replace damaged wiring.
• Reset the vehicle's control module.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regularly inspect battery connections.
• Ensure proper maintenance of the charging system.
• Avoid overloading the electrical system.
Electrical System Issue
• Avoid using high-demand electrical accessories until repaired.
• Have the vehicle inspected by a professional promptly.
Check with your vehicle manufacturer for specific warranty coverage related to electrical components.
This code is relatively uncommon and is usually associated with specific vehicle models with advanced battery management systems.
Moderate – Addressing this issue is important to prevent battery drain and potential vehicle starting problems.
Driving with an unresolved electrical issue can lead to further damage and may compromise vehicle safety.
• Vehicle in 'On' position
• Battery charging system active
The negative contactor is typically located near the battery or within the battery management system module.
Q: Can I drive with a P2D72 code?
A: It's not recommended to drive for long periods with this code active, as it can lead to battery drain.
Q: How do I reset the P2D72 code?
A: After repairs, use an OBD-II scanner to clear the code from the vehicle's computer.
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