NHTSA Complaint #11513715 — 2018 NISSAN LEAF

The PTC Heater and A/C compressor failed on my 2018 Nissan Leaf, just as the winter of 2022 was getting started. The vehicle passed prior service inspections, with no mention of issues on either of these components. The failure of the PTC heater and A/C compressor results in a "Service EV System" error message, and indication that the vehicle would not restart after powering off. When this error message appeared, the heating and defrost capabilities of the vehicle were lost. The fans would continue to blow air, but windows would fog up. I could not charge my vehicle in this error state either, so if I hadn't been close to home, I would've been in a potentially dangerous situation because it was cold out. The local Nissan dealership confirmed the error codes of P0AA6-1A (HV battery voltage system isolation) and P31E7 (restart inhibition) were present. They initially fixed this issue after nearly 5 months of the vehicle being in their shop. These codes, paired with the information I've read on the Internet, indicates others have had this issue before, and the normal repair involved replacing the traction battery (400v high-voltage battery), not these two components. The "Service EV System" came back less than 36 hours after paying for the repair. The 12v battery was also at a low voltage, which may have been related to the vehicle sitting for so long for service without being charged.