C0143
Air Suspension Exhaust Solenoid Valve Circuit
Moderateelectrical
Overview
The C0143 code indicates that the chassis control module has detected a air suspension exhaust solenoid valve circuit condition. This diagnostic trouble code relates to the electrical control circuits within the vehicle's chassis safety systems, including ABS, traction control, and stability control. When this code is stored, one or more chassis safety features may be disabled, which can reduce braking performance and vehicle stability under adverse driving conditions.
Symptoms
- Loss of stability control function
- Electronic parking brake malfunction warning
- Vehicle leans excessively during cornering
- Steering feels heavy or unresponsive
Common Causes
- Faulty ABS valve body or solenoid pack
- Poor ground connection at the ABS module
- Failed power steering control module
- Battery voltage too low or unstable
Diagnosis Steps
- 1Connect an OBD-II scanner and read all stored chassis trouble codes and freeze frame data
- 2Inspect the ABS/ESC module connectors for corrosion, damage, or loose pins
- 3Check the ABS fuse and relay in the fuse box; replace if blown or faulty
- 4Test the ABS pump motor operation using a scan tool bi-directional command
- 5Measure circuit voltage and ground at the ABS module with a multimeter
Estimated Repair Cost
$150 — $1,200
Cost varies by vehicle, location, and repair shop. Includes parts and labor.
Commonly Affected Vehicles
Honda AccordToyota TundraDodge Ram 1500Mercedes-Benz C-Class
Related Codes
More Electrical Codes
B0001Driver Frontal Airbag Deployment Loop Circuit Open
CriticalB0002Driver Frontal Airbag Deployment Loop Circuit Short to Ground
CriticalB0003Driver Frontal Airbag Deployment Loop Circuit Short to Battery
CriticalB0004Driver Frontal Airbag Deployment Loop Resistance Too High
CriticalB0005Driver Frontal Airbag Deployment Loop Resistance Too Low
CriticalB0006Passenger Frontal Airbag Deployment Loop Circuit Open
CriticalFrequently Asked Questions
Your standard brakes will still work, but the anti-lock braking function is disabled. This means wheels can lock up during hard braking, especially on wet or icy roads. Avoid aggressive driving and have the system inspected promptly.