Why Does Preheat Light Flash After the Engine is Warm?
The preheat light is flashing after the engine is warmed up.
Situation or Problem
The ECU (engine control unit) uses this existing indicator light as it's own warning or trouble light.
If the preheat light is flashing any time other than at cold start up, the ECU is storing a code and the engine is possibly going into a protection mode. A protection mode will typically limit engine rpm depending on urgency of the problem. As an example, high coolant temperature or low engine oil pressure would limit engine rpm to low idle. Call your local dealer for diagnosis.
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