Adjust your TPS

[Persizi]

Is there a problem that the STP sensor looks like this?

[Will14]

Is there a problem that the STP sensor looks like this?

One of mine looked a lot like this, it happened after I had sprayed some chemical cleaner on the bike so assume it was a reaction with the plastic, it didn't change how the bike ran or the setting of the sensor

[Eric GSX1400K3]

Same here, a razor blade gets rid of this if you scrape carefully.  As long as the sensor is working fine no issues.

[grog]

Clean them up, theyll come back the same. Just leave alone.

[KiwiCol]

Bit of black spray paint?  or bit of marker pen . . .