AutoCodes – Chevrolet – P1EAC Chevrolet

P1EAC Chevrolet Code - Hybrid/EV Battery Cell Overvoltage Signal Circuit Performance

Quick Answer

The 2nd protection is a redundant method to monitor cell group overvoltage. Common causes include Faulty Hybrid Powertrain Control Module 2, Hybrid Powertrain Control Module 2 harness is open or shorted, Hybrid Powertrain Control Module 2 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: P1EAC Chevrolet indicates Hybrid/EV Battery Cell Overvoltage Signal Circuit Performance.
Common causes: Common causes include Faulty Hybrid Powertrain Control Module 2, Hybrid Powertrain Control Module 2 harness is open or shorted, Hybrid Powertrain Control Module 2 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 1,363

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
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Code P1EAC Chevrolet Description

The 2nd protection is a redundant method to monitor cell group overvoltage. The four hybrid/EV battery interface control modules independently read and test each cell group. The 2nd protection circuit fault is the actual hardwire signal from the four hybrid/EV battery interface control modules to the hybrid/EV battery energy control module and terminating in the hybrid/EV powertrain control module 2. The hybrid/EV powertrain control module 2 diagnoses this line to determine when a cell group overvoltage condition exists.
The 2nd protection self test diagnostic is used to check the signal circuit. The hybrid/EV battery energy control module performs this test, once, every power down cycle. When run/crank input signal transitions low and after a calibrated delay, the hybrid/EV battery energy control module informs the hybrid/EV powertrain control module 2, via serial data communication bus that it is about to run the diagnostics on the 2nd protection circuit. The hybrid/EV battery energy control module then proceeds to command, via internal serial data, each hybrid/EV battery interface control module to run the check on its hardwire output. Each of the four hybrid/EV battery interface control modules pulls the signal circuit low and releases it, in sequence. If any pulses are missing, the hybrid/EV battery energy control module is able to diagnose which hybrid/EV battery interface control module(s) has a fault and sets a related fault and sends this information to the hybrid/EV powertrain control module 2 on the serial data

OBDII Code P1EAC Chevrolet - Hybrid/EV Battery Cell Overvoltage Signal Circuit Performance - AutoCodes.com — P1EAC Chevrolet Code - Hybrid/EV Battery Cell Overvoltage Signal Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1EAC Chevrolet?

Faulty Hybrid Powertrain Control Module 2
Hybrid Powertrain Control Module 2 harness is open or shorted
Hybrid Powertrain Control Module 2 circuit poor electrical connection

How to Fix the DTC P1EAC 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 P1EAC 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 P1EAC Chevrolet Code

1. What are the common symptoms of OBDII code P1EAC in a Chevrolet hybrid/EV vehicle?

- Common symptoms include reduced hybrid system performance, check engine light illumination, and potential battery-related warnings on the dashboard.

2. What causes the OBDII code P1EAC related to Hybrid/EV Battery Cell Overvoltage Signal Circuit Performance in Chevrolet vehicles?

- This code is typically triggered by a malfunction in the battery management system, high voltage circuits, or individual battery cell overvoltage issues.

3. How can I diagnose the OBDII code P1EAC in my Chevrolet hybrid/EV vehicle?

- Diagnosis involves using a professional OBDII scanner to retrieve the specific fault code, inspecting the hybrid battery system for any visible damage, and testing the voltage signals in the battery cells.

4. Can I continue driving my Chevrolet hybrid/EV vehicle with the OBDII code P1EAC present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the battery system and potentially unsafe driving conditions.

5. What are the repair options for resolving the OBDII code P1EAC in a Chevrolet hybrid/EV vehicle?

- Repair options include replacing faulty battery cells, repairing damaged wiring or circuits, updating the hybrid system software, or seeking professional assistance from a certified technician.

6. Are there any safety precautions to consider when dealing with the OBDII code P1EAC in a Chevrolet hybrid/EV vehicle?

- Yes, it is crucial to follow proper safety protocols when working with high-voltage systems, such as disconnecting the auxiliary battery and wearing appropriate personal protective equipment.

7. How much does it typically cost to repair the OBDII code P1EAC in a Chevrolet hybrid/EV vehicle?

- Repair costs can vary depending on the extent of the issue, parts needed for replacement, and labor charges. It is advisable to consult with a professional technician for an accurate estimate.

8. Can a DIY enthusiast with automotive knowledge fix the OBDII code P1EAC issue in a Chevrolet hybrid/EV vehicle?

- While some basic troubleshooting steps can be taken, resolving the OBDII code P1EAC usually requires specialized tools, training, and expertise. It is recommended to seek professional help for proper diagnosis and repair.

9. Will resetting the OBDII code P1EAC in a Chevrolet hybrid/EV vehicle make it go away permanently?

- Simply resetting the code may clear the warning temporarily, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is essential to diagnose and fix the root cause of the problem.

10. How often should I have the hybrid/EV battery system inspected to prevent issues like the OBDII code P1EAC in my Chevrolet vehicle?

- Regular maintenance schedules, as recommended by the manufacturer, should be followed to ensure the proper functioning of the hybrid/EV battery system. Inspections during routine service appointments can help prevent issues like the P1EAC code from occurring.