P1E71 Cadillac Code - Hybrid/Electric Vehicle Battery 70 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
- P1E71 Cadillac indicates Hybrid/Electric Vehicle Battery 70 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 P1E71 Cadillac 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 P1E71 Cadillac?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P1E71 Cadillac?
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 P1E71 Cadillac 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 P1E71 Cadillac Code
What does the OBDII code P1E71 mean on a Cadillac?
The P1E71 code indicates an issue with the Hybrid/Electric Vehicle Battery 70 Circuit, typically related to the battery's voltage sensing or communication system.
What are the symptoms of the P1E71 code on a Cadillac?
Common symptoms include a check engine light, reduced hybrid or electric performance, limited EV range, or the vehicle failing to start in electric mode.
What causes the P1E71 code on a Cadillac?
Potential causes include a faulty hybrid battery sensor, damaged wiring or connectors in the battery circuit, or issues with the hybrid battery control module.
Can I drive my Cadillac with the P1E71 code active?
Driving with the P1E71 code is not recommended, as it can lead to reduced performance, potential battery damage, or further complications with the hybrid system.
How is the P1E71 code diagnosed?
Technicians diagnose this code by using a scan tool to check for related codes, inspecting the hybrid battery circuit wiring and connectors, and testing the voltage sensor and control module.
What are common fixes for the P1E71 code on a Cadillac?
Repairs may include replacing a faulty hybrid battery sensor, repairing damaged wiring or connectors, or reprogramming or replacing the hybrid battery control module.
Can a low auxiliary 12V battery trigger the P1E71 code?
While uncommon, a weak or failing auxiliary 12V battery can sometimes contribute to communication errors in the hybrid system, potentially triggering the code.
How much does it cost to repair the P1E71 code on a Cadillac?
Repair costs vary widely depending on the specific issue, ranging from $100 for wiring repairs to over $1,000 if the hybrid battery control module needs replacement.
Does the P1E71 code mean the hybrid battery needs to be replaced?
Not necessarily. The code typically points to a problem with the battery’s circuit or sensors, not the battery itself, though a full diagnosis is required to confirm.
Can a software update fix the P1E71 code on a Cadillac?
In some cases, a software update for the hybrid battery control module may resolve the issue if it's related to programming errors.
Discuss the causes and fixes for P1E71 Cadillac OBDII Code
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