P1B55 Chevrolet Code - Hybrid/Electric Vehicle Battery 38 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
- P1B55 Chevrolet indicates Hybrid/Electric Vehicle Battery 38 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 P1B55 Chevrolet 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 P1B55 Chevrolet?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P1B55 Chevrolet?
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 P1B55 Chevrolet 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 P1B55 Chevrolet Code
1. What does the OBDII code P1B55 mean for a Chevrolet?
P1B55 indicates a "Hybrid/Electric Vehicle Battery 38 Circuit Low Voltage" issue, meaning the voltage from battery cell 38 is lower than expected.
2. What are the common symptoms of code P1B55 on a Chevrolet?
Symptoms may include reduced performance of the hybrid/electric system, warning lights on the dashboard, or loss of battery charging capability.
3. What causes the P1B55 code to appear?
Common causes include a faulty battery cell, damaged wiring or connectors in the battery circuit, or a malfunctioning battery control module.
4. Can I drive my Chevrolet with a P1B55 code?
It’s not recommended to drive with this code, as it can lead to further damage to the hybrid/electric battery system and reduced vehicle performance.
5. How is the P1B55 code diagnosed?
A technician will use a scan tool to confirm the code, inspect the battery pack and related wiring, and perform voltage tests on individual cells.
6. What repairs are needed for a P1B55 code?
Repairs may include replacing the faulty battery cell, repairing or replacing damaged wiring, or reprogramming or replacing the battery control module.
7. How much does it cost to fix a P1B55 code on a Chevrolet?
Repair costs vary but can range from a few hundred dollars for wiring repairs to several thousand dollars if the battery pack needs replacement.
8. Can a P1B55 code be caused by extreme temperatures?
Yes, extreme hot or cold temperatures can affect battery performance and potentially trigger this code.
9. Will resetting the code fix the P1B55 issue?
Resetting the code without addressing the underlying problem will not fix the issue, and the code will likely return.
10. How can I prevent the P1B55 code from occurring?
Regular maintenance, avoiding extreme temperatures, and ensuring the battery cooling system is functioning properly can help prevent this code.
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