2020 Chevrolet Bolt fuel/propulsion system problems

“My 2020 Chevrolet Bolt EV experienced a loss of propulsion that left the vehicle disabled in a parking lot. The vehicle initially displayed a motor-control system warning. It subsequently displayed "Drivetrain Power Lost" and refused to shift out of Park. After turning the vehicle off and waiting approximately five minutes, I restarted it. The READY indicator returned, and the vehicle shifted into Drive, but when I attempted to accelerate, it shuddered severely instead of moving normally. The service warning indicator remained illuminated. I stopped attempting to operate the vehicle because it was unsafe to drive. OnStar retrieved diagnostic trouble code P0A3F, associated with the drive motor position sensor circuit. Significantly, General Motors issued Technical Service Bulletin 19-NA-220 in May 2020, specifically covering loss of propulsion and DTC P0A3F in 2017–2020 Chevrolet Bolt EVs. Under the bulletin's "Cause" section, GM identifies a possible spread terminal in the X2 wiring harness connection on the transmission assembly. GM further states that the terminals may not have been properly aligned during installation at the vehicle assembly plant. The…”

“Recall 21V650 (GM N212345944) remedy not provided. The advanced diagnostic software (Software Final Remedy) was installed XXX. I bought the car used on XXX at 16,187 miles. While charging was still limited to 80% by the recall software, the software flagged the battery (DTC U362C-09) and propulsion power was reduced. Ron Tonkin Chevrolet ([XXX]) replaced the high-voltage battery pack on XXX at 21,409 miles (RO [XXX], GM TAC case XXX), which is within the 6,214-mile diagnostic period and before GM's XXX and XXX deadlines. GM's own owner letter filed with NHTSA (RMISC-21V650-9675) says such a replacement includes an extended 8-year/100,000-mile battery warranty from the replacement date. GM instead coded the repair as an ordinary warranty repair (labor op XXX), and the recall replacement-battery warranty was never added to my VIN. I am asking that GM provide the full recall remedy, including the Bolt Battery Limited Part Warranty.”

“GM installed Advanced Monitoring Software on the car rather than replace the battery. The software detected a battery fault. Under the battery recall if a fault is detected the battery is replaced free of charge. GM is refusing to replace the battery. Now the car will not move.”

“General Motors is using the arbitrary 6,213-mile tracking window of Recall 944 to deny coverage for a diagnosed Cell Section 3 hardware failure at 123,582 miles. However, this vehicle is directly impacted by the failure parameters outlined in the expanded GM Safety Recall N242470160 / N242470162, where GM openly acknowledges to federal regulators that the advanced diagnostic software has failed to properly detect defective battery modules. By denying a physical battery replacement when a manufacturing defect is caught during a mandatory corporate software reconfiguration, GM is violating the spirit and legal intent of their ongoing federal safety recall campaigns.”

“When driving the car through a busy intersection there was a sudden, brief surge of acceleration, followed by deceleration and the vehicle cutting all motor power and becoming inoperable. The MIL lamp illuminated and the "Ready" light went out. I was unable to move the vehicle out of traffic until I got out and disconnected / reconnected the 12v battery to reset the car systems. The problem is difficult to reproduce, happening randomly, sometimes with multiple months between incidents. The incidents happen with no warning, and there are no other symptoms associated with the issue. The dealer mechanic indicated it is likely the issue indicated in Chevrolet TSB 19-NA-220, indicating the root cause is the resolver feedback connector on the electric drive unit damaged during vehicle assembly.”

“I purchased a 2020 Chevrolet Bolt EV in late 2023, already equipped with GM's recall diagnostic software (part of NHTSA Recall 21V650), which monitored battery health and limited charging to 80%. After the monitoring period, the software detected critical voltage variation failures across all 5 battery cell module rows. The dealer (Lee Johnson KIA, Kirkland WA) opened a TAC case (#9-14753041951), GM authorized a full high voltage battery replacement, and the work was completed on May 27, 2025 at no charge (Job Card 603815). Despite the replacement being triggered entirely by recall-installed software and authorized through GM's own TAC process, GM classified the repair as a standard warranty repair rather than a recall repair — denying me the fresh 8-year/100,000-mile parts warranty that applies to recall battery replacements.”