Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Theory Of Operation
The Park Assist Sensors are ultrasonic transceivers that are monitored by the Park Assist Module (PAM). The sensors transmit ultrasonic signals to the PAM which allow it to detect if obstacles are in the path of the vehicle. Each sensor has a dedicated signal circuit and shared sensor supply and return circuit from the PAM. The PAM monitors the electrical integrity of the sensors and circuits and if a fault is detected a Diagnostic Trouble Code (DTC) will set.
The numbering system for the park assist sensors allows for up to twelve sensors on the vehicle consisting of six front and six rear sensors. The sensors are numbered in a clockwise manner starting at the left front bumper. If equipped with front park assist, the left front sensor is the number 1 sensor. The numbering continues in a clockwise direction around the vehicle.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.