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P0503 Vehicle speed sensor - no signal/above limit value

Possible cause of fault:
- No signal or faulty signal from PSM control module
- Rear right wheel speed sensor faulty
- CAN data bus faulty
- PSM control module faulty


Fault code 1682 - Speed signal, rear right wheel

Possible cause of fault
- Signal from PSM control module does not correspond to expected signal (please read out fault memory)
- Signal from PSM control module does not correspond to expected signal (implausible signal)


I would check the right rear speed sensor - replace if needed - then re-test.


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  • 3 weeks later...
  • 2 weeks later...

Hi I have something similar but different 

I have the psm light and phc light come on instantly 

ive researched and checked the wiring near foot LHS and I actually didn’t find any previous joins like some others I’ve seen corroded, my wiring was dry also, I also researched that it could be the brake light switch but my lights are working and like someone else my switch isn’t where it should be, I did find that someone asked the same thing about where his switch is but the answer was written on a different post which I couldn’t find, if someone could help it would be much appreciated 

Id like to ad that I used my obd but those faults won’t show so I can’t get a computer reading to help me


Stevie G 

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