P1B85 Code - Hybrid/Electric Vehicle Battery 54 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
- P1B85 indicates Hybrid/Electric Vehicle Battery 54 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 P1B85 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 P1B85?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P1B85?
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 P1B85 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
- P1B85 Buick — Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage
- P1B85 Cadillac — Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage
- P1B85 Chevrolet — Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage
- P1B85 GMC — Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage
- P1B85 Saturn — Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage
Frequently Asked Questions about P1B85 Code
1. What are the common symptoms of OBDII code P1B85 (Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage)?
- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential problems with starting the vehicle.
2. What are the possible causes of OBDII code P1B85 (Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage)?
- The code may be triggered by issues such as a weak or failing hybrid/electric vehicle battery, faulty battery management system, damaged wiring, or loose connections.
3. How can I diagnose the OBDII code P1B85 (Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage)?
- Diagnosing the code typically involves using a diagnostic scanner to retrieve the code, inspecting the hybrid/electric vehicle battery and related components for physical damage, and testing the voltage levels.
4. Can I continue driving with OBDII code P1B85 (Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage) present?
- It is not recommended to continue driving with this code present, as it can lead to further damage to the hybrid/electric system and potentially leave you stranded.
5. How can I repair OBDII code P1B85 (Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage)?
- Repairing this code often involves addressing the root cause, which may include replacing the hybrid/electric vehicle battery, repairing damaged wiring, or recalibrating the battery management system.
6. Are there any DIY tips for troubleshooting OBDII code P1B85 (Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage)?
- DIY tips for troubleshooting this code include checking the battery connections for tightness, inspecting the battery terminals for corrosion, and ensuring the battery is properly charged.
7. How critical is it to address OBDII code P1B85 (Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage) promptly?
- It is important to address this code promptly to prevent further damage to the hybrid/electric system and ensure the safe operation of the vehicle.
8. Can a faulty hybrid/electric vehicle battery cause OBDII code P1B85 (Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage)?
- Yes, a weak or failing hybrid/electric vehicle battery can trigger this code due to low voltage levels in the battery circuit.
9. Is it necessary to reset the OBDII system after repairing OBDII code P1B85 (Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage)?
- It is recommended to reset the OBDII system after repairing the code to clear the error code and ensure proper functioning of the vehicle's systems.
10. What should I do if OBDII code P1B85 (Hybrid/Electric Vehicle Battery 54 Circuit Low Voltage) keeps recurring after repairs?
- If the code keeps recurring after repairs, it is advisable to seek professional assistance to diagnose any underlying issues that may be causing the repeated fault.
Discuss the causes and fixes for P1B85 OBDII Code
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TOYOTA DEALER READ CODE AND SUGGESTED A PROBLEM WITH AIR CONDITIONING, SUGGESTED NEED FOR A/C LINE AND REPROGRAMMING PROCESSOR: COST- $1500.
CAR IS RAV4 PRIME, IS THIS POSSIBLE? P1B85 CODE ONLY COMES ON IN EV MODE, MAKING ME THINK YOUR EXPLANATION IS MORE LIKELY CORRECT. -
Let me check if I can find more information. What year is your RAV4?
Answer: https://www.autocodes.com/p...
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Unfortunately, I'm unable to find any information for the P1B85 code on any Toyota service manual or repairs database. Either your vehicle is too new, or you got the wrong code. My only suggestion is to get a second opinion from another dealer. The code is for an EV problem and there is no indication that it is related to the A/C system.
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