What Does C1761 Mean?
The rear air suspension height sensor high-range (SE) signal circuit is open. The control module receives no signal from this sensor, indicating a disconnected plug, broken wire, or failed sensor element. Rear auto-leveling and height adjustment are disabled.
Common Causes
35%
Disconnected rear height sensor connector
30%
Broken signal wire in the harness, often near the rear axle where flexing occurs
20%
Open circuit inside the rear height sensor
15%
Corroded terminal creating intermittent open connection
Diagnostic Steps
1
Step 1: Confirm the rear height sensor connector is fully plugged in and the locking tab is engaged.
2
Step 2: Measure continuity of the signal wire from the sensor connector to the module connector — an OL reading confirms an open wire.
3
Step 3: Inspect the harness where it flexes near the rear axle or body-to-frame transition — this is where fatigue breaks typically occur.
4
Step 4: If the harness is intact, bench-test the sensor by applying 5V/ground and checking for a signal output while moving the arm.
5
Step 5: Repair the open wire or replace the sensor, clear codes, and calibrate.
Estimated Repair Cost
$150 - $500
Parts + labor, varies by vehicle and location
The rear air suspension height sensor high-range (SE) signal circuit is open. The control module receives no signal from this sensor, indicating a disconnected plug, broken wire, or failed sensor element. Rear auto-leveling and height adjustment are disabled.
The most common cause of C1761 (Air Suspension Rear Height Sensor High (SE) Signal Circuit Open) is: Disconnected rear height sensor connector
Typical repair costs for C1761 range from $150 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Rear ride height cannot be measured or controlled. Vehicle may ride unevenly. Drivable at low speeds but should be repaired to restore proper suspension function.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1761 to identify the root cause.
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Quick Info
Category
Chassis
System
Air Suspension System
Difficulty
Type
Manufacturer
Recommended Tools
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