AutoCodes – Saturn – P0AC2 Saturn

P0AC2 Saturn 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 Saturn 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 1,007

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

What does this mean?

What are the Possible Causes of the DTC P0AC2 Saturn?

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 Saturn?

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 Saturn 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 Saturn Code

1. What are common symptoms of OBDII code P0AC2 in a Saturn hybrid/EV vehicle?

- Common symptoms include the illumination of the Check Engine light, reduced fuel efficiency, and potential issues with the hybrid/EV system performance.

2. What does the OBDII code P0AC2 in a Saturn indicate?

- The code P0AC2 indicates a problem with the Hybrid/EV Battery Low Resolution Current Sensor Circuit being detected as having a high voltage.

3. What are possible causes of the Hybrid/EV Battery Low Resolution Current Sensor Circuit high voltage issue in a Saturn?

- Possible causes include a faulty current sensor, issues with the battery management system, wiring problems, or a malfunction in the hybrid/EV battery.

4. How can I diagnose the OBDII code P0AC2 in my Saturn hybrid/EV vehicle?

- Diagnosis typically involves using a diagnostic scan tool to retrieve the fault code, checking the current sensor and circuit for any visible damage, and conducting a thorough inspection of the battery system components.

5. Can I continue driving my Saturn with the OBDII code P0AC2 present?

- It is not recommended to continue driving your vehicle with the code present, as it can lead to further damage to the hybrid/EV system and potentially affect the vehicle's overall performance.

6. How can I repair the Hybrid/EV Battery Low Resolution Current Sensor Circuit high voltage issue in my Saturn?

- Repairing the issue may involve replacing the faulty current sensor, repairing any damaged wiring, resetting the fault code, and conducting a thorough test drive to ensure the problem is resolved.

7. Will resetting the OBDII code P0AC2 in my Saturn make the issue go away permanently?

- Simply resetting the code may temporarily clear the Check Engine light, but it will not fix the underlying problem causing the high voltage issue in the Hybrid/EV Battery Low Resolution Current Sensor Circuit.

8. Is it safe to attempt DIY repairs for the OBDII code P0AC2 in a Saturn hybrid/EV vehicle?

- Unless you have experience and knowledge working with hybrid/EV systems, it is recommended to seek professional help for diagnosing and repairing the issue to ensure safety and proper functionality of the vehicle.

9. How much does it typically cost to repair the Hybrid/EV Battery Low Resolution Current Sensor Circuit high voltage issue in a Saturn?

- Repair costs can vary depending on the specific cause of the issue, but it is advisable to budget for potential sensor replacement, wiring repairs, and diagnostic fees from a qualified technician.

10. Can regular maintenance help prevent the occurrence of OBDII code P0AC2 in a Saturn hybrid/EV vehicle?

- Regular maintenance, including scheduled inspections of the hybrid/EV system components, can help detect potential issues early on and prevent the occurrence of codes like P0AC2 by addressing any underlying problems promptly.