I'm trying to diagnose poor sensitivity of the parking sensors while I have the front bumper off the car. Dealer SA noticed the issue and said they'd look at the sensors if I decided to have them repair the horn issue. I declined as the horns alone would have been over $1000. Now that I'm thinking about them I realized that it may not just be the front that has poor response, but I'm trying to recall if the same issue occurs for the rear. I did not research this problem when I had a Tech Info subscription but searching online the box for the parking sensors may be in the trunk somewhere near the battery. If anyone knows anything please advise? I'll report once/if I find something/anything.

Thanks!

 

If you have lane change assist I’d be concerned about reduced sensitivity at the rear sensors if the same module processes front and rear sensor data.

 

Thank you for that warning!

No lane change assist feature on this car. It was nice to have on the Macan loaner they gave me while the Panamera was in for service.

 

I tested mine with the iCarsoft Por II and had one bad, bought it replaced it, but pain in the butt to take the bumper off just for a sensor

 

Thank you for letting me know iCarsoft Por II can help. Did you have any error messages on the in car displays? What was the problem you noticed was wrong?

​​​​​​Ours doesn't seem to respond to nearby objects consistently, weak sensitivity. No error message that there is a problem with the system. I don't know if my Foxwell tool has access to read it either.

 

Actually I didn't even know, it was the inside passenger one, and when I did my first code reading with the tool it showed up, so I tested with a garbage can to see it was bad. I am unsure of how they would go "weak" as I thought they either work or don't. Could be one or two of the 4 perhaps.

 

Pulled all the front sensors from the bumper. I can't tell whether any of them are at fault after measuring resistances with a multimeter. (Each sensor has three pins).

 

There is video on utube where a guy used his iPhone in video mode to hear each sensor ticking....

 

Thank you, except I have the front bumper off, unless you can get them to tick without being installed?...

 

Just plug them in with the bumper off and test

 

They are ultrasonic sensors. Measuring resistance across them is like weighing your pc to see why it is so slow.

You need a code reader to see which one reports a fault, or to recalibrate them.