Sport mode will also keep both motors engaged. Almost sounds like the rear motor is over heating and it's limiting power to it, going around 70mph shouldn't be any issue for it. Or it may be a bad motor temp sensor giving false readings. I would use your obd2 app to monitor temperature and see if it's reporting anything funny and it will likely need to goto the dealer. Haven't heard of that happening before and no TSBs listed for the motor, just battery preconditioning and charging issues.
Rear motor not operating 45 min after charge!
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?
![Car Vehicle Automotive mirror Trip computer Personal luxury car]()
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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I use the Car Scanner app on my phone, with a obd2 bluetooth adapter from amazon. Says it's out of stock many most others should work fine as well.
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Car Scanner ELM OBD2 - Apps on Google Play
Trip computer+car diagnostic tool with widest variety of features and dashboard!
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