Check Engine light on 95 Turbo R

[RUSTGEEZER]

Hi All

The check engine light comes on intermittently on my car.
I can use it 5 or 6 times on long or short journeys and it stays off.Then I can do a couple of short journeys and it stays on all of the time.

I can reset it using the trip/cancel buttons with the ignition on in park but then it comes on when it feels like it.

Any help appreciated!

Regards,Gary.

[RUSTGEEZER]

Cheers Gents
Took the car to Hillier Hill and the only fault code is for the knock sensors.
They tell me its quite common-has anybody had this issue and solved the problem as they tell me that replacing the sensors doesn't allways work?