AutoCodes – GMC – P0AC2 GMC

P0AC2 GMC Code - Hybrid/EV Battery Low Resolution Current Sensor Circuit High Voltage

Quick Answer

The hybrid/EV battery current sensor is mounted inside the hybrid/EV battery pack. Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0AC2 GMC indicates Hybrid/EV Battery Low Resolution Current Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,012

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0AC2 GMC Description

The hybrid/EV battery current sensor is mounted inside the hybrid/EV battery pack. The positive high voltage cable that goes to the positive contactor relay passes through the hybrid/EV battery pack current sensor. The hybrid/EV battery pack current sensor detects the amperage that flows in and out of the hybrid/EV batteries. The battery energy control module supplies and monitors a 5 V reference signal to the hybrid/EV battery pack current sensor. The hybrid/EV battery pack current sensor returns a signal between 0 and 5 V to the battery energy control module. The hybrid/EV battery pack current sensor signal is in proportion to the amperage going in and out of the hybrid/EV battery pack. A signal voltage of the hybrid/EV battery pack current sensor greater than 2.5 V indicates that the hybrid/EV battery is being charged and a signal voltage less than 2.5 V indicates discharging. The hybrid/EV battery pack current sensor has 2 measurement ranges in order to maintain accuracy. The ranges are low resolution and high resolution. The measurement ranges of the hybrid/EV battery pack current sensor have some overlap with each other. The high resolution measures from -23 to +23 A. The low resolution measures from -470 to +280 A.

OBDII Code P0AC2 GMC - Hybrid/EV Battery Low Resolution Current Sensor Circuit High Voltage - AutoCodes.com — P0AC2 GMC Code - Hybrid/EV Battery Low Resolution Current Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0AC2 GMC?

Faulty Battery Energy Control Module
Battery Energy Control Module harness is open or shorted
Battery Energy Control Module circuit poor electrical connection

How to Fix the DTC P0AC2 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0AC2 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0AC2 GMC Code

1. What are the common symptoms of OBDII code P0AC2 GMC?

The common symptoms of code P0AC2 include the check engine light illuminating, reduced hybrid or electric vehicle performance, and possible issues with the battery management system.

2. What could cause the Hybrid/EV Battery Low Resolution Current Sensor Circuit High Voltage code to appear?

This code may be triggered by a faulty low-resolution current sensor, high voltage in the battery circuit, damaged wiring, or a malfunctioning battery management system.

3. How serious is the P0AC2 code on a GMC hybrid or electric vehicle?

The P0AC2 code should be addressed promptly as it can affect the performance and efficiency of the hybrid or electric vehicle. Ignoring the issue may lead to further damage to the battery system.

4. Can I still drive my GMC with the P0AC2 code present?

It is not recommended to continue driving the vehicle with the P0AC2 code active, as it can result in poor performance, reduced fuel efficiency, and potential damage to the battery system.

5. What are some DIY repair tips for OBDII code P0AC2 GMC?

DIY repair tips for code P0AC2 may include checking and repairing any damaged wiring, inspecting the low-resolution current sensor, and ensuring proper connections in the battery circuit.

6. How can a mechanic diagnose the Hybrid/EV Battery Low Resolution Current Sensor Circuit High Voltage code?

A mechanic can diagnose the P0AC2 code using a scan tool to retrieve the specific fault codes, testing the low-resolution current sensor, inspecting the battery circuit for high voltage, and checking the battery management system.

7. Is it safe to reset the OBDII code P0AC2 without fixing the underlying issue?

Resetting the code without addressing the underlying issue is not recommended, as the problem will likely persist and could lead to more severe issues in the future.

8. How much does it cost to repair OBDII code P0AC2 on a GMC vehicle?

The cost of repairing code P0AC2 can vary depending on the root cause of the issue, the extent of the damage, and the labor rates of the repair shop. It's best to consult with a professional for an accurate estimate.

9. Can a faulty hybrid or electric vehicle battery cause the P0AC2 code?

Yes, a faulty hybrid or electric vehicle battery can potentially trigger the P0AC2 code due to issues with the current sensor circuit and high voltage readings.

10. How can I prevent OBDII code P0AC2 from reoccurring in my GMC hybrid or electric vehicle?

To prevent the P0AC2 code from reoccurring, it's essential to maintain regular maintenance on the battery system, address any warning signs promptly, and have the vehicle inspected by a qualified technician regularly.