C1757: Air Suspension Front Height Sensor High (SE) Signal Circuit Open

What does C1757 mean?

C1757 is a diagnostic trouble code indicating "Air Suspension Front Height Sensor High (SE) Signal Circuit Open". This means there is an electrical break in the suspension wiring — a connector may be unplugged, a wire broken, or a component has failed internally. The ECU detected no signal where it expected one.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Intermittent warning lights
• Erratic gauge readings

Common causes

• Damaged or corroded wiring harness
• Loose or disconnected electrical connector
• Failed suspension sensor or actuator
• Blown fuse in the related circuit
• Poor ground connection

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.