HMM, didn't see Jeetans reply but saw yours Ken. Anyway, I talked to a Hyundai tech about this, First thing he said was crank sensor.
I asked him why, He said it's a common issue on them, the sensor doesn't set close enough to the crank to generate a reliable signal. Then when the car is cold the battery tends to not crank it fast enough to signal the PCM. His fix was to remove the sensor, use a swab to clean out the hole and replace the sensor with a new one. Then load test the battery and/or clean the terminals and ground connections.
He also mentioned the main control relay can cause this.
Monday, January 2nd, 2017 AT 1:22 PM