• Engine may not start
• Security light may be illuminated
• Communication errors logged in other modules
• Faulty immobilizer control module
• Damaged or corroded wiring or connectors
• Faulty CAN bus network
CAN bus: A robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other without a host computer.
Immobilizer: A security device that prevents the engine from running unless the correct key is present.
• U0100
• U0121
Your car's computer is having trouble talking to one of its parts. It's like when your phone can't connect to the internet.
The code U0087 indicates a problem with the communication network in the vehicle.
U0087 is a diagnostic trouble code (DTC) for 'Lost Communication with Vehicle Immobilizer Control Module.' This means that the vehicle's control modules are unable to communicate with the immobilizer control module over the Controller Area Network (CAN) bus.
• Check for other communication-related codes
• Inspect wiring and connectors for damage or corrosion
• Test the immobilizer control module
• Repair or replace damaged wiring or connectors
• Replace the immobilizer control module
• Reprogram the control module if necessary
• OBD-II scanner
• Multimeter
• Wiring diagram
$150 - $500
Moderate
• Toyota Camry
• Honda Accord
• Ford Focus
• Regularly inspect and maintain wiring and connectors
• Avoid moisture exposure to electronic components
• Ensure software updates are performed
Communication Network Issue
• Have the vehicle inspected by a professional
• Do not ignore the warning lights on the dashboard
Check with your vehicle manufacturer for warranty coverage on electronic components.
This code has become more common as vehicles have become more reliant on electronic communication networks.
Moderate – While the vehicle may still operate, failure to address the issue could lead to more severe problems.
Ignoring this code may lead to vehicle immobilization, which can be a safety risk.
• Vehicle at operating temperature
• Ensure battery voltage is sufficient
The immobilizer control module is typically located near the steering column or under the dashboard.
Q: Can I drive with a U0087 code?
A: It's not recommended as it may lead to the vehicle not starting or other communication issues.
Q: Will a U0087 code clear itself?
A: The code may clear if the issue is resolved, but it's best to have it checked and cleared with a scanner.
