AutoCodes – Chevrolet – P0AC2 Chevrolet

P0AC2 Chevrolet 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 Chevrolet 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 1,109

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

What does this mean?

What are the Possible Causes of the DTC P0AC2 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet Code

1. What does the OBDII code P0AC2 mean for a Chevrolet vehicle?

The P0AC2 code indicates an issue with the Hybrid/EV batteryâ€™s low-resolution current sensor circuit, specifically detecting a high voltage condition.

2. What are the common symptoms of the P0AC2 code?

Common symptoms include reduced fuel efficiency, limited hybrid/EV performance, an illuminated check engine light, and potential issues with the vehicle's battery charging or discharging.

3. What causes the P0AC2 code to appear on a Chevrolet?

This code is commonly caused by a faulty current sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning hybrid/EV battery control module.

4. Can a bad hybrid battery trigger the P0AC2 code?

Yes, a failing hybrid battery or its associated components can cause irregular sensor readings, potentially triggering the P0AC2 code.

5. How do you diagnose the P0AC2 code on a Chevrolet?

Diagnosis involves using a scan tool to check for related codes, inspecting the current sensor and circuit wiring for damage, and testing the hybrid battery control module for proper operation.

6. Is it safe to drive with the P0AC2 code active?

It is not recommended to drive with this code active, as it could indicate a serious issue with the hybrid/EV battery system that may lead to reduced performance or further damage.

7. How is the P0AC2 code typically fixed?

Repairs may include replacing the faulty current sensor, repairing damaged wiring or connectors, reprogramming or replacing the hybrid battery control module, or addressing issues with the battery itself.

8. Can clearing the code fix the P0AC2 issue?

Clearing the code may temporarily remove the error, but if the underlying issue is not resolved, the code will return.

9. How much does it typically cost to fix the P0AC2 code on a Chevrolet?

Repair costs vary widely depending on the root cause, ranging from $100â€“$300 for sensor or wiring repairs to $1,000 or more if the hybrid battery or control module needs replacement.

10. Can a software update resolve the P0AC2 code on a Chevrolet?

In some cases, a software update to the hybrid/EV control module may resolve the issue if itâ€™s related to a programming fault. However, this should be determined after thorough diagnosis.