P1B38 Code - Battery Energy Control Module Hybrid Battery Voltage Balance Processor 5 Performance
Quick Answer
The hybrid battery pack contains a total of 32 cell groups in the hybrid/EV battery pack assembly. Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module circuit poor electrical connection. 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
- P1B38 indicates Battery Energy Control Module Hybrid Battery Voltage Balance Processor 5 Performance.
- Common causes
- Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module circuit poor electrical connection.
- 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 P1B38 Description
The battery energy control module monitors the voltage of the 32 battery cell groups. A voltage sense circuit is attached to each individual cell group. Each of these circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness connectors the voltage sense circuits to the battery energy control module, located directly above the hybrid battery pack.
To ensure proper battery function and lengthen battery life, the battery energy control module balances the voltage of the cells so that each cells maintains the same voltage level. The battery energy control module uses internal voltage gates to transfer voltage from cells with a higher voltage level to those cells with a lower voltage level. To maintain a similar state of charge on the cell groups, the starter/generator control module monitors the cell voltages and determines which cells need energy removed in order to maintain the cells at a similar state of charge. A resistor wired in parallel with the cell and a transistor switch in series with the resistor internal to the battery energy control module. The starter/generator control module sends a command to the battery energy control module to begin cell balancing.
What are the Possible Causes of the DTC P1B38?
- Faulty Battery Energy Control Module
- Battery Energy Control Module harness is open or shorted
- Battery Energy Control Module circuit poor electrical connection
How to Fix the DTC P1B38?
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 P1B38 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.
Need more information about the P1B38 code?
Need more information on how to fix the P1B38 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1B38 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1B38 Buick — Battery Energy Control Module Hybrid Battery Voltage Balance Processor 5 Performance
- P1B38 Cadillac — Battery Energy Control Module Hybrid Battery Voltage Balance Processor 5 Performance
- P1B38 Chevrolet — Battery Energy Control Module Hybrid Battery Voltage Balance Processor 5 Performance
- P1B38 GMC — Battery Energy Control Module Hybrid Battery Voltage Balance Processor 5 Performance
- P1B38 Saturn — Battery Energy Control Module Hybrid Battery Voltage Balance Processor 5 Performance
Frequently Asked Questions about P1B38 Code
1. What are the common symptoms of OBDII code P1B38?
- Common symptoms include a decrease in hybrid system performance, reduced fuel efficiency, and potential issues with starting the vehicle.
2. What can cause the OBDII code P1B38 to trigger?
- This code is typically triggered by a fault in the Battery Energy Control Module Hybrid Battery Voltage Balance Processor 5, which can be caused by issues with the hybrid battery or its components.
3. How can I diagnose the OBDII code P1B38?
- Diagnosing this code usually involves using a professional OBDII scanner to read the code and assess the hybrid battery system for any faults or abnormalities.
4. What repairs are typically needed for OBDII code P1B38?
- Repairs for this code may involve replacing the faulty Battery Energy Control Module Hybrid Battery Voltage Balance Processor 5 or addressing any underlying issues with the hybrid battery pack.
5. Are there any DIY repair tips for OBDII code P1B38?
- DIY repair is not recommended for this code due to the complexity and safety considerations involved in working with hybrid battery systems. It is best to consult a professional mechanic or dealership for repairs.
6. Can driving with OBDII code P1B38 cause further damage to the vehicle?
- Continuing to drive with this code may lead to further deterioration of the hybrid system's performance and potential damage to other components, so it is advisable to address the issue promptly.
7. How much does it cost to repair OBDII code P1B38?
- Repair costs for this code can vary depending on the extent of the issue and the specific repairs needed. It is recommended to get a professional assessment for an accurate repair estimate.
8. Is it safe to drive the vehicle with the OBDII code P1B38?
- It is generally not recommended to drive the vehicle with this code present, as it can impact the vehicle's performance and potentially lead to more severe issues over time.
9. Can a low hybrid battery voltage cause the OBDII code P1B38 to appear?
- Yes, a low hybrid battery voltage imbalance can be a contributing factor to triggering the P1B38 code, as it indicates an issue with the hybrid battery's performance.
10. How often should I have the hybrid battery system checked to prevent OBDII code P1B38 from occurring?
- It is recommended to have the hybrid battery system inspected regularly as part of routine maintenance to help prevent issues like OBDII code P1B38 from arising.
Discuss the causes and fixes for P1B38 OBDII Code
Code P1B38 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
