Another Parking Sensor Issue

[ttaylor2]

2020 ram 1500 bighorn 5.7 hemi etorque

Currently having an issue with my front parking sensors on my truck. Currently, all front sensors (6 total) are showing the same error of "PTS sensor circuit short to ground". The error says to service front parksense.

I find it unlikely, but not impossible, that all sensors are bad. This started as an intermittent issue. At first the error would only happen occasionally, and I could hear all the sensors clicking from time to time. Now nothing works with the front parksense system at all.

I'm thinking it's either a module issue or a wiring issue. I'm leaning towards the module. Is there a way to test the module before replacing it? Is there an easy way to get at the front wiring/sensors without removing bumpers etc?

 

[ttaylor2]

Replaced all front parking sensors and checked wiring. Still running into the same codes as listed in the main post. All sensors are showing as a "short to ground". Rear park assist works flawlessly, front still says service and refuses to work. Does this sound like the parking control module?

 

[Cbty2050]

Load tester your circuits. The sensor ground and supply circuits are all shared on the front sensors

 

[ttaylor2]

Well, after replacing my front sensors, I was finally able to get them working today. Truck started with the error showing, but after driving a short while, I turned them on and they stayed on.

After slowing down, maybe under 25mph or so, the error came back on and the sensors shut off. What would cause these to trip at a slower speed?

 

[Cbty2050]

The system doesn't work at speed. If I recall correctly they are turned off automatically at around 10mph. If all you front sensors are setting codes as you described, triple check the power and ground to the sensors.