2020 Chevrolet Bolt EV fuel system problems

Filed Nov 5, 2026 · Electrical, Fuel system · TN

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 bulletin explains that this condition can cause loss of propulsion and prescribes replacement of the affected wiring harness. My vehicle's symptoms and diagnostic code closely match this documented condition. However, the precise cause has not yet been confirmed by a dealership inspection. I am reporting this incident because a potential factory-assembly defect that can cause unpredictable loss of propulsion presents a significant safety concern, particularly if it occurs while driving in traffic. I believe the connection between this incident and GM's previously documented condition warrants investigation into whether other Chevrolet Bolt EVs may be affected.

Filed Oct 23, 2026 · Electrical, Fuel system · HI

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 the federal safety agency (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. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 6, 2026 · Fuel system · MS

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.

Filed Jun 19, 2026 · Electrical, Fuel system · SC

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.

Filed Jun 2, 2026 · Electrical, Fuel system · KS

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.

Filed May 6, 2026 · Fuel system · WA

I purchased a 2020 Chevrolet Bolt EV in late 2023, already equipped with GM's recall diagnostic software (part of the federal safety agency 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.

Filed Apr 12, 2026 · Electrical, Fuel system · WA

This is the second time since owning car this has happened the recall battery is not working again this time me and my sister were at the gas station were I work and this is all on camara at Chevron gas station were I work I went inside sister stayed in car it started making a buzzing sound under my dash car shut off windows wouldn't go down locked doors could not get car to turn on trapped us in car this is scary and smelled a wire burning smell started to get scared pounded on window couldn't get out ! Couldn't unlock doors this is very scary tried hitting window and it would not break we were stuck this has happened once before car just needed plug in to dealership computer to reset car it was fine for 2weeks and bam a month later I'm again having to take it back to have it reset because of this battery recall it's not fixed I still owe 14k for car I totally have been ripped off it's scary that these cars catch fire and u can not get out! Can't unlock doors windows nothing and u just get stuck I don't feel safe whatsoever in this car

Filed Jan 7, 2026 · Electrical, Fuel system · CO

While waiting to turn left at a light and driving in "L" (one pedal) mode, I started to release the break in anticipation of oncoming lanes clearing, as I lifted the pedal the car lurched into the intersection. The Bolt normally accelerates very gently in L mode when no break is applied, but does not lurch forwards like this under normal conditions. The breaks did work, and I was able to stop, but I was now in the middle of the intersection and slightly encroaching into oncoming lanes. I tried to accelerate to pull through, but the car did not respond. After several second of frantically pushing the accelerator, the car slowly and jerkily moved forward and cleared the intersection. My Chevy dealer says this is a known problem with service bulletin "Chevrolet TSB 19-NA-220". In my opinion this is incredibly dangerous and should have been recalled. However, there is no recall that I can find and outrageously Chevy will not cover this manufacturing defect under warranty as they specifically exclude wiring harnesses due to past issues with rodent damage, and they are hiding behind that rule.

Filed Aug 29, 2025 · Electrical, Fuel system · CT

High-voltage battery failure left Bolt EV immobilized after recall fix: Our 2020 Chevrolet Bolt EV (VIN: [XXX] ) became completely immobilized on [XXX], due to high-voltage battery failure. The vehicle previously underwent all recall remedies, including a full propulsion battery replacement in May 2023, but less than two years later the same issue has reoccurred. This failure left us stranded and unable to operate the car. Loss of propulsion without warning presents a serious safety risk, particularly if it were to occur while driving at speed. Out of concern for fire risk, the dealer (Colonial Chevrolet in Milford, CT) parked the disabled vehicle approximately 500 feet away from other cars and structures. The dealer diagnosed the failure as HV battery pack malfunction and confirmed the pack requires replacement. The vehicle remains in their custody and is available for inspection upon request. GM Customer Assistance has denied two separate repurchase claims (case #[XXX] and #[XXX]), despite the prolonged immobilization and repeated delays. The car has been inspected by Colonial Chevrolet and GM representatives. Despite prior recall service and battery replacement, the Bolt is inoperable again, raising concerns that the recall remedy was ineffective and that other Bolt EV owners may face the same hazard. No warning lamps or error messages appeared prior to failure. The vehicle simply would not start on [XXX]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 28, 2025 · Fuel system · 25,100 miles · IN

The contact owns a 2020 Chevrolet Bolt EV. The contact stated that upon starting the vehicle, the message "Propulsion Power Reduced - Service Soon" was displayed, and check engine warning light was illuminated. The contact stated that upon investigation, it was discovered that the power output was limited. Despite the failure, the contact was able to drive the vehicle to the dealer. The contact was informed that the battery needed to be replaced. The contact was then informed that the battery replacement was on an indefinite backorder. The contact was not provided an estimate for when the battery would become available. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was 25,100.