P1BF7 Code - Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage
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
- P1BF7 indicates Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage.
- 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 P1BF7 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 P1BF7?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P1BF7?
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 P1BF7 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
- P1BF7 Buick — Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage
- P1BF7 Cadillac — Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage
- P1BF7 Chevrolet — Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage
- P1BF7 GMC — Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage
- P1BF7 Saturn — Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage
Frequently Asked Questions about P1BF7 Code
1. What does the OBDII code P1BF7 mean?
P1BF7 indicates a "Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage," meaning the voltage in the specific circuit of the hybrid battery is lower than expected.
2. What are the common symptoms of code P1BF7?
Symptoms may include an illuminated check engine light, reduced hybrid system performance, decreased fuel efficiency, and possible loss of electric drive functionality.
3. What causes the P1BF7 code to appear?
The code can be caused by a faulty battery cell, damaged wiring or connectors in the battery circuit, or issues with the hybrid battery control module.
4. Can I continue driving with a P1BF7 code?
It’s not recommended to drive for extended periods with this code active, as it may lead to further damage to the hybrid system or reduced vehicle performance.
5. How is the P1BF7 code diagnosed?
A technician will use a scan tool to read the code, inspect the hybrid battery circuits, test the battery voltage levels, and check for damaged wiring or connectors.
6. How do you fix a P1BF7 code?
Repairs may involve replacing faulty battery cells, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the hybrid battery control module.
7. How much does it cost to repair a P1BF7 code?
Repair costs can vary widely, with minor wiring repairs costing a few hundred dollars and hybrid battery replacement potentially exceeding $2,000.
8. Can low temperatures trigger the P1BF7 code?
Yes, extreme cold can affect battery performance and may trigger this code, but persistent issues usually point to an underlying fault.
9. Does the P1BF7 code always require battery replacement?
No, the issue may be resolved by repairing wiring, replacing a single faulty cell, or addressing control module issues without replacing the entire battery.
10. How can I prevent the P1BF7 code from recurring?
Regular hybrid system maintenance, keeping battery terminals clean, and promptly addressing warning lights can help prevent future occurrences.
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