OBD2 Code C1761: Rear Right Height Sensor Open Circuit
The C1761 code indicates that the Vehicle Suspension Module (VSM) has detected an open circuit in the rear right height sensor. This sensor provides a variable analog voltage signal (typically 0.5V to 4.5V) to report the body position relative to the rear axle. An open circuit means the module receives no valid signal, with voltage stuck at reference or 0V, preventing automatic control of the rear air suspension height.
1. Commonly Affected Makes
2. Most Common Causes
- Damaged or disconnected rear right height sensor
- Open wiring between the sensor and VSM module
- Corroded connector or damaged pins
- Interrupted sensor ground (GND) circuit
- Missing reference voltage (VREF) from the module to the sensor
- Internal VSM module failure affecting signal reading
3. Symptoms You Will Notice
- Rear suspension may sag or sit unevenly
- Air suspension warning light illuminated
- Vehicle may ride lower than normal on the right rear
- Automatic leveling function disabled
4. Step-by-Step Diagnosis
Scan for additional codes and verify C1761 is present
Visually inspect the rear right height sensor connector and wiring for damage or corrosion
Measure voltage at the sensor connector: check for 5V reference and good ground
If reference and ground are OK, test sensor output signal voltage while moving the suspension
If sensor signal is missing or out of range, replace the sensor; if wiring is open, repair as needed
5. Frequently Asked Questions
Is it safe to drive?▼
Driving is possible but not recommended for long distances. The rear suspension may not adjust properly, leading to poor ride quality and potential strain on other components. Have it diagnosed soon.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on whether the sensor or wiring needs replacement and labor rates.