This is an ECU PCB and the measurement of resistance between Vcc and GND for the TC1762 Tricore MCU in the PCB is 18.7 Ω.

I have a reference board, the resistance there is 400 Ω between Vcc and GND for the same IC. When I power up the PCB in the first board, the MCU gets hot, while it doesn't in the reference board, although the reference board lacks a firmware in the MCU.

The voltage reading on the Vcc is 3.3 V. I'm suspicious that this resistance between Vcc and GND is the reason why the PCB's current is higher in the first board, it has 0.41 A, while in the reference board is 0.24 A.

Is 18.7 Ω between Vcc and GND in this PCB the possible cause for this problem? Given that the there's a problem in the first board, and I was debugging it. Is such resistance can be considered as a short between Vcc and GND?