What are the common causes of P0A8A?

Corrosion or damage at the sensor wiring. A current sensor that fails when hot. An electrical overload or short. A weak battery.

Read 14 volt power module current sensor A data on a scan tool. Wiggle test the sensor wiring and connectors. Check the electrical system for an overload or short. Test the battery condition. Replace the current sensor if the signal drops. Clear the code and retest.

P0A8A

14 Volt Power Module Current Sensor A Circuit Intermittent

System: Powertrain control (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P0A8A means 14 Volt Power Module Current Sensor A Circuit Intermittent.

Where it lives

For P0A8A, the circuit described runs through the sensor. The description of P0A8A reports a fault at the sensor.

Check these first

Corrosion or damage at the sensor wiring
A current sensor that fails when hot
An electrical overload or short
A weak battery

What to do next

Read 14 volt power module current sensor A data on a scan tool
Wiggle test the sensor wiring and connectors
Check the electrical system for an overload or short
Test the battery condition
Replace the current sensor if the signal drops
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.