P1EAC GMC 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 GMC 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.
Code P1EAC GMC Description
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
What are the Possible Causes of the DTC P1EAC GMC?
- 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 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 P1EAC 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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Frequently Asked Questions about P1EAC GMC Code
1. What are the common symptoms of OBDII code P1EAC in a GMC Hybrid/EV vehicle?
- Common symptoms include check engine light illumination, reduced hybrid/EV system performance, and potential drivability issues.
2. What could cause the OBDII code P1EAC to trigger in a GMC Hybrid/EV vehicle?
- This code is typically triggered by issues with the battery cell overvoltage signal circuit, such as a faulty sensor or wiring problem.
3. How can I diagnose the cause of OBDII code P1EAC in my GMC Hybrid/EV vehicle?
- Diagnosis usually involves using a scan tool to read the code, checking the battery cell overvoltage sensor, inspecting related wiring, and performing voltage tests.
4. Is it safe to continue driving my GMC Hybrid/EV vehicle with OBDII code P1EAC present?
- It is not recommended to continue driving with this code active, as it can lead to further damage to the hybrid/EV system components.
5. What are some repair tips for addressing OBDII code P1EAC in a GMC Hybrid/EV vehicle?
- Repair tips may include replacing the faulty battery cell overvoltage sensor, repairing damaged wiring, clearing the code, and performing a system reset.
6. Can I reset OBDII code P1EAC in my GMC Hybrid/EV vehicle without fixing the underlying issue?
- While you can clear the code temporarily, it is important to address the root cause to prevent the code from reoccurring and ensure proper vehicle operation.
7. How much does it typically cost to repair OBDII code P1EAC in a GMC Hybrid/EV vehicle?
- Repair costs can vary depending on the specific issue, but they may range from a few hundred to a few thousand dollars, including parts and labor.
8. Are there any preventive measures to avoid OBDII code P1EAC in a GMC Hybrid/EV vehicle?
- Regular maintenance, such as checking the hybrid/EV system components and addressing any issues promptly, can help prevent the occurrence of this code.
9. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P1EAC in a GMC Hybrid/EV vehicle?
- While some troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing complex hybrid/EV system issues may require professional expertise.
10. How long does it take to repair OBDII code P1EAC in a GMC Hybrid/EV vehicle?
- The repair time can vary based on the specific issue and the technician's experience, but it may take a few hours to a full day to diagnose and fix the problem correctly.
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