Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means the car's charger isn't working as well as it should when plugged into the wall, like when your phone charger takes too long to charge your phone.
The vehicle's charging system is not operating efficiently when using an AC power source.
The P1C56 code indicates that the Universal Charger Extension Control Module has detected a low efficiency in the AC charging process. This could be due to issues within the charger, the power supply, or the charging cable itself.
• Longer charging times
• Reduced driving range
• Warning light on dashboard
• Faulty charging cable
• Defective charger module
• Poor power supply connection
AC: Alternating Current
OBD-II: On-Board Diagnostics, Second Generation
• Inspect the charging cable for damage.
• Test the power outlet with a different device.
• Check the charger module for faults using a diagnostic tool.
• Replace the charging cable if damaged.
• Repair or replace the charger module.
• Ensure proper connection to the power supply.
• Multimeter
• OBD-II scanner
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Volt
• Nissan Leaf
• Tesla Model S
• Regularly inspect the charging cable for wear.
• Use a dedicated power outlet for charging.
• Avoid using extension cords for charging.
Charging System Issue
• Do not ignore the warning light; address the issue promptly.
• Consider using a different power outlet to rule out power supply issues.
Check with the vehicle manufacturer for warranty coverage on charging components.
This code typically appears in electric and hybrid vehicles with AC charging capabilities.
Moderate – While the vehicle can still operate, charging efficiency is reduced, which may affect driving range.
Ensure all repairs are conducted in accordance with local regulations and safety standards.
• Vehicle connected to an AC power source
• Charger module active
The charger module is typically located near the front of the vehicle, often within the engine bay or near the charging port.
Q: Can I still drive my car with this code?
A: Yes, but you may experience longer charging times and reduced range.
Q: Is it safe to charge my car with this issue?
A: It's generally safe, but you should address the issue to ensure optimal charging performance.
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