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Rear motor not operating 45 min after charge!

1416 Views 28 Replies 9 Participants Last post by  wesleyorama
I am more than halfway into a 2,200 mile trip with a 5 month old 2023 I5, just passed the 5k mile mark. Beginning yesterday I noticed while on cruse control the car would lurch forward to compensate for being 2-3 mph under the cruse set point. Today I figured out the rear motor was no longer operating, the lurch was the delay until the front motor took over.

Today I charged 3 times for +/-30 min each. Then driving 70 mph for ~45 min all is normal car drives fine (no lurching). After 45 min of driving at 70 mph, the rear motor ceases to function, I then enable SNOW mode (constant AWD) to prevent lurching. (Image shows front motor doing all the work, rear shows a single bar but ODB2 reports zero)

Checked ODB2, no stored DTC's. The rear motor torque that was ranging between -8 & 35 during the 45 min after the charge, then torque is a constant zero.

Anybody know of a service bulletin that addresses this issue?
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When you experience this temperature on RWD propulsion unit stator temperature....
Are you pulling trailer
Are going over long incline for more than 10 miles
What is additional weight you have in the vehicle.
Was the battery management active for getting HV DC pack up to temperature
Driving with normal luggage & 2 ppl. No trailer, no excessive speed, 75mph 90% of the time.
How long inclines you had when this started happening.....
What was percentage RWD vs using carscanner app before FWD was actively managing propulsion?
I do know that most of pids for Hyundai EV platform was donated by some German engineer.... that does this as hobby on all vehicles he get chance to collect data.
Motor pid temperature is under question is really Motor stator temperature or pid that is showing estimated rotor temperature from other sensors.
And if by mistake carscanner developers had it set wrong formula or name for this pid.
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I will test it out on my 2023 Ioniq 6 when I get the chance and see if factory scanner is showing same value as carscanner app.
My bets is that this pid is for E-machine rotor calculated temperature ( there is no real temperature sensor, it is calculated by other sensors data
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