Df115 trouble shooting rpm/ fuel issue

[boashna]

if you are in fail safe mode which is 3000 rpm and you are able to clear it by resetting the ignition. If you throttle up then throttle down then up again the temp will go up and down so rapidly that fail safe will engage
Cylinder temp. sensor code 1 – 4 or Exhaust manifold temp. sensor code 1 – 5
another idea will be air leak in fuel line but no alarm will sound for second issue .