Ford F-150 Lightning

P0AC1

Warning

Hybrid Battery Pack Current Sensor "A" Circuit Low

Severity
Warning
Category
Battery
Code Type
EV-Specific
Applicable Regions
US, EU, Global

What does P0AC1 mean?

Fault code P0AC1 means "Hybrid Battery Pack Current Sensor "A" Circuit Low". It is an EV/Hybrid-specific diagnostic trouble code (DTC) in the powertrain system, classified as "battery" with a severity level of "warning". This code indicates a condition that should be addressed soon. Schedule a diagnostic appointment within the next few days to prevent further damage. This code is defined by the SAE J2012 / ISO 15031-6 standard and applies to OBD-II compliant vehicles sold in the US, EU, and other global markets. [Ford EV-specific: High Voltage Battery Negative Contactor Control Circuit High. Applies to: Mustang Mach-E, F-150 Lightning, E-Transit]

Possible Causes

  • Battery cell degradation or damage
  • Battery Management System (BMS) malfunction
  • Wiring harness or connector issue in high-voltage circuit
  • Software calibration error

Recommended Actions

  1. 1 Schedule service as soon as possible
  2. 2 Have the high-voltage battery system inspected by an authorized EV technician
  3. 3 Do not attempt to service high-voltage components yourself

This code applies to all vehicles. View generic P0AC1 information →