P1E72 Code - Hybrid/Electric Vehicle Battery 71 Circuit
Quick Answer
The Hybrid/Electric Vehicle battery pack contains 288 cells. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module. 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
- P1E72 indicates Hybrid/Electric Vehicle Battery 71 Circuit.
- Common causes
- Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module.
- 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 P1E72 Description
The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sense circuits are attached to each individual cell group, and these sense circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness joins this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.
What are the Possible Causes of the DTC P1E72?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P1E72?
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 P1E72 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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Information for Specific Makes
- P1E72 Buick — Hybrid/Electric Vehicle Battery 71 Circuit
- P1E72 Cadillac — Hybrid/Electric Vehicle Battery 71 Circuit
- P1E72 Chevrolet — Hybrid/Electric Vehicle Battery 71 Circuit
- P1E72 GMC — Hybrid/Electric Vehicle Battery 71 Circuit
- P1E72 Saturn — Hybrid/Electric Vehicle Battery 71 Circuit
Frequently Asked Questions about P1E72 Code
1. What does the OBDII code P1E72 mean?
P1E72 indicates an issue with the Hybrid/Electric Vehicle Battery 71 Circuit, which typically relates to a fault in the battery monitoring or management system.
2. What are the common symptoms of code P1E72?
Symptoms may include the check engine light turning on, reduced hybrid or electric vehicle performance, poor battery charging, and limited driving range.
3. What causes the P1E72 code to appear?
Common causes include a faulty battery sensor, damaged wiring or connectors in the battery circuit, or a malfunctioning hybrid battery control module.
4. Can I still drive my vehicle with the P1E72 code?
While the vehicle might still be drivable, reduced performance and potential safety risks make it important to address the issue promptly to avoid further damage.
5. How can I diagnose the P1E72 code?
Diagnosis typically involves scanning the vehicle with an OBDII tool, inspecting the battery circuit wiring and connectors, and testing the hybrid battery control module for faults.
6. What is the typical repair for the P1E72 code?
Repairs may involve replacing a faulty battery sensor, repairing damaged wiring, or replacing the hybrid battery control module if it’s defective.
7. Can a weak hybrid battery cause the P1E72 code?
Yes, a degraded or faulty hybrid battery can trigger the P1E72 code by disrupting the battery management system.
8. Does the P1E72 code require battery replacement?
Not always; the issue may be related to the circuit or sensors, so a full battery replacement is only necessary if the battery is confirmed to be defective.
9. How much does it cost to repair the P1E72 code?
Repair costs can vary widely, from $100 for minor wiring repairs to over $1,000 if the hybrid battery control module or battery needs replacement.
10. Can a software update fix the P1E72 code?
In some cases, a software update from the manufacturer may address communication issues in the battery management system and resolve the code.
Discuss the causes and fixes for P1E72 OBDII Code
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