U2500: (CAN) Lack of Acknowledgement From Engine Management
HighNetwork/CommunicationCAN Bus
What does U2500 mean?
U2500 is a diagnostic trouble code indicating "(CAN) Lack of Acknowledgement From Engine Management". This code relates to your vehicle's can bus and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Noticeable change in engine performance
- Unusual sounds or vibrations
- Possible issues with can bus operation
- Vehicle may enter reduced power mode (limp mode)
Estimated repair cost
Typical range in Australia (parts + labour)
$200 – $1200 AUD
Common causes
- Faulty can bus component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
This code sits in a powertrain control module. The engine or transmission can drop into limp mode or cut out, which is its own hazard in traffic or on a motorway. Get it diagnosed before your next trip rather than waiting for the next service.
Get a diagnosis for YOUR car
Code U2500 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.