B0959 GMC Possible Causes
- Faulty Parking Aid Rear Sensor 1 Left Middle
- Parking Aid Rear Sensor 1 Left Middle harness is open or shorted
- Parking Aid Rear Sensor 1 Left Middle circuit poor electrical connection
First diagnose B0959 GMC code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
B0959 GMC Tech NotesB0959 01 Parking Aid Rear Sensor 1 Left Middle Circuit Short to Battery
B0959 06 Parking Aid Rear Sensor 1 Left Middle Circuit Short to Ground or Open
B0959 08 Parking Aid Rear Sensor 1 Left Middle Circuit Signal Invalid
B0959 21 Parking Aid Rear Sensor 1 Left Middle Circuit Incorrect Period
Cost of diagnosing the B0959 GMC code
Labor: 1.0The cost of diagnosing the B0959 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B0959 GMC Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B0959 GMC MeaningThe object alarm detection system senses how close the vehicle is to an object. The distance is determined by the 4 ultrasonic sensors located in the rear bumper. The object detection system will notify the driver when backing up at speeds less than 8 km/h (5 mph), which make parking easier and helps you avoid colliding with objects such as parked vehicles. Each object sensor is a 3-wire sensor that is both a transmitter and a receiver that comprises a signal circuit, a low reference circuit, and an 8-volt supply voltage circuit. The rear object control module supplies 8 volts to the object sensors via the object sensor supply voltage circuit and provides ground via the low reference circuit. The rear object control module triggers the sensors in a sequential loop and after each sensor transmits, the rear object control module uses the echo or signal return to calculate the distance and position of an object from the rear bumper. The rear object control module directly controls the Rear Parking Assist (RPA) display. The RPA consists of 2 amber and one red LED that indicates the range of an object from the rear bumper. The rear object control module will also use an audible warning by sending a low speed GMLAN message to the radio.
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