• Malfunctioning infotainment system
• Loss of certain accessory functions
• Warning lights on the dashboard
• Faulty accessory protocol interface module (APIM)
• Damaged wiring or connectors
• Faulty control module
APIM: Accessory Protocol Interface Module
DTC: Diagnostic Trouble Code
• U0256
• U0257
Your car's computer is having trouble talking to one of its parts, like when a phone loses connection to Wi-Fi.
The vehicle's computer has lost communication with a specific module.
U0255 is a diagnostic trouble code (DTC) that indicates a loss of communication with the accessory protocol interface module (APIM). This means that the main control unit cannot communicate with the APIM, which is responsible for various accessory functions.
• Check for other related codes.
• Inspect wiring and connectors for damage.
• Test the APIM for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty APIM.
• Reprogram or update the vehicle's software.
• OBD-II scanner
• Multimeter
• Wiring repair tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain vehicle wiring.
• Ensure software updates are performed.
• Avoid moisture exposure to electronic components.
Communication Error
• Ensure your vehicle's software is up to date.
• Check for recalls related to the APIM.
• Consult a professional mechanic if unsure.
Check with your vehicle manufacturer for warranty coverage on electronic components.
This code has been more common in vehicles with complex infotainment systems introduced in the last decade.
Moderate – It may affect non-essential functions, but should be addressed to ensure full vehicle functionality.
Ignoring this code may lead to reduced functionality of vehicle accessories, which could impact driving comfort and convenience.
• Vehicle in park with ignition on.
• Ensure all accessories are turned off.
The accessory protocol interface module is typically located behind the dashboard or in the center console area.
Q: Can I drive my car with a U0255 code?
A: Yes, but some accessory functions may not work properly.
Q: Will a U0255 code affect my car's performance?
A: No, it primarily affects accessory functions, not engine performance.
