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

- Code Popularity: 1,358 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1EAC Buick?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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
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How to Fix the DTC P1EAC Buick?

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

Search for P1EAC Buick Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1EAC Buick code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P1EAC Buick 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 Buick - Hybrid/EV Battery Cell Overvoltage Signal Circuit Performance - AutoCodes.com
P1EAC Buick Code - Hybrid/EV Battery Cell Overvoltage Signal Circuit Performance

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