• Cruise control not functioning
• Warning light on the dashboard
• Possible other communication-related issues
• Faulty cruise control module
• Wiring issues or poor connections in the CAN bus
• Faulty PCM or software issue
PCM: Powertrain Control Module
CAN bus: Controller Area Network bus, a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other.
• U0100
• U0121
This code means that your car's computer is having trouble talking to the cruise control system. It's like when two people try to talk on the phone, but the call keeps dropping.
The vehicle's main computer is unable to communicate with the cruise control module.
The U0237 code indicates a loss of communication between the Powertrain Control Module (PCM) and the Cruise Control Module (CCM). This communication is typically carried out over the CAN (Controller Area Network) bus. When this code is set, it means that the PCM has lost communication with the CCM for a predetermined period of time.
• Check for other codes that might be related to communication issues.
• Inspect the wiring and connectors for the cruise control module.
• Test the cruise control module and PCM for proper operation.
• Repair or replace any damaged wiring or connectors.
• Reprogram or update the PCM software if necessary.
• Replace the cruise control module if it is found to be faulty.
• OBD-II scanner
• Multimeter
• Wiring diagram
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain wiring connections.
• Ensure software updates are applied to the vehicle's computer systems.
• Avoid moisture exposure to electronic components.
Communication Error
• Do not attempt to use cruise control until the issue is resolved.
• Consult with a professional mechanic for a proper diagnosis.
• Keep a record of any unusual behavior for the mechanic.
Check with your vehicle manufacturer for warranty coverage on electronic components.
This code has been more prevalent in vehicles with complex electronic systems and is often related to CAN bus communication issues.
Moderate – While the vehicle can still be driven, the cruise control feature will be unavailable, which may affect long-distance driving comfort.
Driving without a functioning cruise control system is generally safe, but be aware of the increased need for manual speed control.
• Vehicle ignition in the ON position.
• Cruise control system activated.
The cruise control module is typically located near the steering column or integrated into the vehicle's main control module.
Q: Can I still drive my car with this code?
A: Yes, but the cruise control feature will not work.
Q: Will fixing this code improve my car's performance?
A: Fixing this code will restore the cruise control functionality, but it may not affect other aspects of performance.
