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Service bulletins for the 2015 Fiat 500

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

187 on file from NHTSA, as of 2026-10-19.

About P0AA4 on the 2015 Fiat 500: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P0AA4 are shown. Show all

Bulletins, newest first
08-004-15 REVA2018-12-10. Service bulletin. POWER TRAIN; EQUIPMENT:APPLIANCE:AIR CONDITIONER; ELECTRICAL SYSTEM. FLASH: Battery Electric Vehicle, Multiple System Enhancements This bulletin involves updating the software in multiple modules, Vehicle Tracking Module (VTM), Body Control Module (BCM), On-Board Charging Module (OBCM), Power Inverter Module (PIM) and Battery Pack Control Module (BPCM) if required. The customer may experience one or more of the following: ? The vehicle does not start charging when it?s plugged into the charging station. ? Intermittently the charge indicator will show it?s charging when it?s not charging. ? Intermittently the vehicle may have reduced performance. Enhancement: ? Increase of vehicle range in very cold weather. ? Improve Air Conditioning operation. ? Improvements to help reduce 12 volt battery drain when charging the vehicle with incompatible charging station. ? Improvements to DTC diagnostics. ? Enhancements to the central door lock feature. ? Improvements to locate the vehicle, using the smartphone app. ? Increase cabin preconditioning time from 2 to 10 minutes. ? Update information that is displayed by the cluster. ? Enhancements to the high voltage charging system. ? Improves the accuracy of the vehicle estimated range. ? Improve the total Lifetime energy consumed information that is display on a smartphone app. False Malfunction Indicator Lamp (MIL) illumination: ? P1E25-00-Hybrid/Ev Battery Failure Level 2. ? P0AA4-00-Hybrid Battery Negative Contactor Circuit Stuck Closed. ? P0AA6-00-Hybrid Battery Voltage System Isolation Fault.
08-004-15 REVB2018-11-26. Service bulletin. ELECTRICAL SYSTEM. FLASH: Battery Electric Vehicle, Multiple System Enhancements This bulletin involves updating the software in multiple modules, Vehicle Tracking Module (VTM), Body Control Module (BCM), On-Board Charging Module (OBCM), Power Inverter Module (PIM) and Battery Pack Control Module (BPCM) if required. The customer may experience one or more of the following: ? The vehicle does not start charging when it?s plugged into the charging station. ? Intermittently the charge indicator will show it?s charging when it?s not charging. ? Intermittently the vehicle may have reduced performance. Enhancement: ? Increase of vehicle range in very cold weather. ? Improve Air Conditioning operation. ? Improvements to help reduce 12 volt battery drain when charging the vehicle with incompatible charging station. ? Improvements to DTC diagnostics. ? Enhancements to the central door lock feature. ? Improvements to locate the vehicle, using the smartphone app. ? Increase cabin preconditioning time from 2 to 10 minutes. ? Update information that is displayed by the cluster. ? Enhancements to the high voltage charging system. ? Improves the accuracy of the vehicle estimated range. ? Improve the total Lifetime energy consumed information that is display on a smartphone app. False Malfunction Indicator Lamp (MIL) illumination: ? U1014-00-Internal CAN Communication. ? P1E25-00-Hybrid/Ev Battery Failure Level 2. ? P0AA4-00-Hybrid Battery Negative Contactor Circuit Stuck Closed. ? P0AA6-00-Hybrid Battery Voltage System Isolation Fault.
08-004-152018-11-19. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. FLASH: Battery Electric Vehicle, Multiple System Enhancements This bulletin involves updating the software in multiple modules, Vehicle Tracking Module (VTM), Body Control Module (BCM), On-Board Charging Module (OBCM), Power Inverter Module (PIM), Battery Pack Control Module (BPCM) and Electric Vehicle Control Unit (EVCU) if required. The customer may experience one or more of the following: ? The vehicle does not start charging when it?s plugged into the charging station. ? Intermittently the charge indicator will show it?s charging when it?s not charging. ? Intermittently the vehicle may have reduced performance. Enhancement: ? Charging system enhancement during very cold weather. ? Increase of vehicle range in very cold weather. ? Improve Air Conditioning operation. ? Improvements to help reduce 12 volt battery drain when charging the vehicle with incompatible charging station. ? Improvements to DTC diagnostics. ? Enhancements to the central door lock feature. ? Improvements to locate the vehicle, using the smartphone app. ? Increase cabin preconditioning time from 2 to 10 minutes. ? Update information that is displayed by the cluster. ? Enhancements to the high voltage charging system. ? Improves the accuracy of the vehicle estimated range. ? Improve the total Lifetime energy consumed information that is display on a smartphone app. False Malfunction Indicator Lamp (MIL) illumination: ? P1E25-00-Hybrid/Ev Battery Failure Level 2. ? P0AA4-00-Hybrid Battery Negative Contactor Circuit Stuck Closed. ? P0AA6-00-Hybrid Battery Voltage System Isolation Fault.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.