Hi all,I'm having trouble with the parking assist system on my 2004 UL. The system occasionally showed a "check sensors" message indicates front sensors (centre & corners randomly), and all the sensors were originally OEM. I replaced all the front sensors with aftermarket ones (50050 & 50011), and while the corner sensors are working fine, the center ones aren't working at all. I found that the OEM part number from my car was 50020, so I bought 2x 50020 aftermarket sensors, but the system still wasn't working properly and occasionally displays "check system" for front centre only.
I'm wondering if the control module might be the issue or if I should try purchasing used OEM sensors to test. Any thoughts?
Thanks,

 

its probably the aftermarket sensors.

 

I have used aftermarket on mine and fine.

 

More likely to be a wiring fault or dirty connections on those sensors, but could be the control module.

 

Thank you guys!

I will purchase another set of sensor & control module to see whether part is fault.

Will update.

 

I was waiting for the OEM part these days.
The sensor just arrived today, and it works perfectly.

Here is the procedure I did:

1. I bought 2pcs brand new aftermarket sensors matched the OEM part number. The system worked but showed obstacles at front constantly.

2. I bought a used OEM parking assist control module to replace the one in my car, seems like it worked a little bit faster & sensitively. I kept this in the car.

3. I bought a used OEM sensor and installed, the system worked full functionally.

Conclusion:
The aftermarket sensor is somehow cannot pass the system.

Thanks,

 

These sensors probably need to be recalibrated. I'm having a problem with the front driver side and I'll report back with what I find once I hook up my tool