What Does C1722 Mean?
The power supply circuit for the air suspension height sensor is shorted to battery voltage. This means the sensor is receiving excessive voltage, which prevents accurate ride height measurement. The suspension control module cannot properly determine vehicle height, which may cause the system to disable automatic leveling and the vehicle may sit at an incorrect height.
Common Causes
35%
Short to battery voltage in the wiring harness feeding the height sensor power circuit
25%
Failed air suspension height sensor with internal short
20%
Corroded or damaged connector at the height sensor allowing cross-pin contact
15%
Wiring chafed against a power wire or component, creating cross-circuit short
5%
Suspension control module internal fault providing incorrect voltage on the power circuit
Diagnostic Steps
1
Disconnect the height sensor connector and measure voltage on the power supply pin — should be 5V reference. If battery voltage (12-14V) is present, the short is in the harness or module side.
2
With the sensor disconnected, check for continuity between the sensor power wire and battery positive or any 12V circuits in the harness bundle — should read OL.
3
Inspect the height sensor connector for bent or corroded pins, evidence of water intrusion, or pin-to-pin bridging from debris or corrosion.
4
Trace the wiring harness from the suspension module to the sensor, looking for chafing, pinched wires, or areas where the harness may contact power sources.
5
If the harness checks clean, reconnect the sensor and measure the voltage — if it drops to battery voltage only when the sensor is connected, the sensor has an internal short and must be replaced.
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
The power supply circuit for the air suspension height sensor is shorted to battery voltage. This means the sensor is receiving excessive voltage, which prevents accurate ride height measurement. The suspension control module cannot properly determine vehicle height, which may cause the system to di...
The most common cause of C1722 (Air Suspension Height Sensor Power Circuit Short To Battery) is: Short to battery voltage in the wiring harness feeding the height sensor power circuit
Typical repair costs for C1722 range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle can be driven cautiously. The air suspension may default to a fixed height, but ride height could be incorrect, affecting headlight aim, ground clearance, and handling stability. Avoid towing, heavy loads, and rough terrain until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1722 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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