What Does C1724 Mean?
The air suspension height sensor power circuit has a general failure, meaning the suspension module cannot provide or detect proper operating voltage to the height sensor. Without a functioning power supply, the sensor cannot report vehicle ride height. The driver may notice the suspension warning light illuminated and the vehicle sitting at an incorrect or uneven height.
Common Causes
30%
Open circuit (broken wire) in the height sensor power supply wiring
25%
Failed air suspension height sensor drawing no current or excessive current
25%
Corroded or loose connector pins creating intermittent or high-resistance connection
15%
Suspension control module internal fault — failed 5V reference output
5%
Blown fuse or fusible link feeding the suspension module power supply
Diagnostic Steps
1
With the ignition on, measure the voltage at the height sensor connector power pin — should see approximately 5V. If 0V, the circuit is open or the module is not providing reference voltage.
2
Check continuity of the power wire from the sensor connector back to the suspension module connector — should read near 0 ohms. An open reading indicates a broken wire.
3
Inspect the height sensor connector and module connector for backed-out pins, spread terminals, or corrosion that would prevent solid electrical contact.
4
Verify the suspension module is receiving proper power and ground — check module power supply fuse, B+ voltage at module connector, and ground circuit resistance (should be below 0.5 ohms).
5
If the harness and module power check good, substitute a known-good height sensor and verify if the code clears and the system operates normally.
Estimated Repair Cost
$100 - $650
Parts + labor, varies by vehicle and location
The air suspension height sensor power circuit has a general failure, meaning the suspension module cannot provide or detect proper operating voltage to the height sensor. Without a functioning power supply, the sensor cannot report vehicle ride height. The driver may notice the suspension warning l...
The most common cause of C1724 (Air Suspension Height Sensor Power Circuit Failure) is: Open circuit (broken wire) in the height sensor power supply wiring
Typical repair costs for C1724 range from $100 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle can be driven with caution. The air suspension will not maintain correct ride height, which may cause the vehicle to sag or sit high. This affects handling, braking dynamics, and headlight alignment. Repair before extended highway driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1724 to identify the root cause.
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Quick Info
Category
Chassis
System
Air Suspension
Difficulty
Type
Manufacturer
Recommended Tools
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