C1950 Accelerometer Sensor Circuit Malfunction
The C1950 code indicates an electrical fault in the accelerometer sensor circuit, which is typically integrated into the Body Control Module (BCM) or Restraint Control Module (RCM). This sensor measures vehicle G-forces (acceleration and deceleration), providing critical data for airbag deployment decisions, active suspension systems, and stability control. The control module has detected a voltage or resistance value outside the normal operating range in the sensor circuit, which may be caused by an open or short circuit, a faulty sensor, or a defective module.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty or internally damaged accelerometer sensor
- Short to ground or voltage in the sensor circuit harness
- Open circuit or high resistance in sensor connectors
- Defective Body Control Module (BCM) or Restraint Control Module (RCM)
- Voltage or ground supply issues to the control module
- Physical damage from previous impact or moisture ingress in the integrated module
3. Symptoms You Will Notice
- Airbag warning light illuminated
- Stability control or suspension system malfunction indicator
4. Step-by-Step Diagnosis
Scan for additional codes and check freeze frame data
Inspect the accelerometer sensor and its wiring for physical damage, corrosion, or loose connections
Test sensor circuit for shorts, opens, and proper voltage/ground using a multimeter
If wiring is intact, replace the accelerometer sensor (if separate) or the BCM/RCM module as applicable
5. Frequently Asked Questions
Is it safe to drive?▼
No, driving with this code is not recommended as it may disable critical safety systems like airbags and stability control, increasing the risk of injury in a collision.
How much does it cost to fix?▼
Repair costs typically range from $200 to $1,200 depending on whether the sensor or module needs replacement and labor rates.