P0AC4 OBD-II: Hybrid Powertrain Control Module Requested MIL Illumination

P0AC4 Severity

Urgent

Should you fix P0AC4 yourself?

Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.

Proper diagnosis will save you time and money on unnecessary repairs.

Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.

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What causes OBD-II fault code P0AC4?

The vehicle uses several different modules to run self-checks on the high voltage system. If a fault is found by any of the modules, code P0AC4 will set. Additional codes may be stored in other modules.

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OBD II Fault Code

  • OBD II P0AC4

OBD-II Code Diagnostic Trouble Code is defined as a Hybrid Powertrain Control Module Requested MIL Illumination

The vehicle uses several different modules to run self-checks on the high voltage system. If a fault is found by any of the modules, code P0AC4 will be set. Additional codes may be stored in other modules.

Common Problems That Trigger the P0AC4 Code

  • Further diagnostics of the hybrid system is required
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