• Engine may not start
• Check Engine Light illuminated
• Possible stalling or performance issues
• Faulty fuel pump control module
• Damaged or corroded wiring/connectors
• Faulty CAN bus wiring or connections
CAN bus: Controller Area Network, a vehicle's communication network
DTC: Diagnostic Trouble Code
• U0100
• U0101
Your car's computer is having trouble talking to one of its parts, like how your phone might have trouble connecting to Wi-Fi.
This code indicates a communication error between the vehicle's control modules over the CAN bus.
U0099 is a diagnostic trouble code (DTC) indicating a loss of communication with the fuel pump control module on the CAN bus. The Controller Area Network (CAN) bus is a vehicle's internal communication network that allows various control modules to communicate with each other.
• Check for other related DTCs
• Inspect wiring and connectors for damage or corrosion
• Test the fuel pump control module for proper operation
• Repair or replace damaged wiring/connectors
• Replace the fuel pump control module if faulty
• Ensure all connections are secure and corrosion-free
• OBD-II scanner
• Multimeter
• Wiring repair tools
$150 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and clean electrical connections
• Avoid exposure to moisture and corrosive environments
• Perform routine vehicle maintenance
Communication Error
• Have the vehicle inspected by a professional technician
• Avoid driving the vehicle until the issue is resolved
Check with your vehicle manufacturer for warranty coverage on electronic components.
U0099 is a relatively uncommon code, often associated with specific models or conditions where communication issues arise.
Moderate – While the vehicle may still operate, it could lead to more severe issues if not addressed.
Driving with communication errors can lead to unexpected vehicle behavior. Always address these issues promptly to ensure safety.
• Vehicle ignition in the 'ON' position
• Engine running with all electrical systems active
The fuel pump control module is typically located near the fuel tank or integrated within the fuel pump assembly.
Q: Can I drive with a U0099 code?
A: It's not recommended, as communication issues can lead to unexpected vehicle behavior.
Q: Will a U0099 code cause my car to stall?
A: It might, as communication with the fuel pump control module is crucial for engine performance.
