C1814: Air Suspension RR Vent Request Exceeded Max Timing

What does C1814 mean?

C1814 is a diagnostic trouble code indicating "Air Suspension RR Vent Request Exceeded Max Timing". This code relates to your vehicle's suspension 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
• Possible issues with suspension operation
• Vehicle may enter reduced power mode (limp mode)

Common causes

• Faulty suspension 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 the suspension or ride height control. Handling and ride quality can change, especially on air suspension where the car may sag or refuse to raise. Get it diagnosed before loading the car up or towing.