P0B73 Cadillac Code - Hybrid/Electric Vehicle Battery 12 Circuit Performance
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
- P0B73 Cadillac indicates Hybrid/Electric Vehicle Battery 12 Circuit Performance.
- 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 P0B73 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 P0B73 Cadillac?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P0B73 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 P0B73 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 P0B73 Cadillac Code
What does the OBDII code P0B73 mean for a Cadillac?
The P0B73 code indicates an issue with the performance of the Hybrid/Electric Vehicle Battery 12 Circuit, suggesting a potential problem in the battery monitoring system or the battery itself.
What are the common symptoms of the P0B73 code in a Cadillac?
Symptoms may include the illumination of the check engine light, reduced hybrid or electric performance, decreased fuel efficiency, or the vehicle entering limp mode.
What causes the P0B73 code to appear in a Cadillac?
Possible causes include a faulty battery cell, damaged battery wiring or connectors, a malfunctioning battery control module, or issues with the battery temperature sensors.
How is the P0B73 code diagnosed in a Cadillac?
A technician will use a scan tool to access the vehicle’s diagnostic trouble codes, inspect the hybrid battery and related wiring, and test the battery control module for proper operation.
Can driving with the P0B73 code damage the vehicle?
Driving with this code can cause further damage to the hybrid battery system or related components if the issue is not resolved promptly.
How can the P0B73 code be fixed in a Cadillac?
Repairs may include replacing damaged wiring or connectors, repairing or replacing faulty battery cells, updating the battery control module software, or replacing the module if necessary.
Is the P0B73 code covered under warranty for a Cadillac?
This depends on the vehicle’s warranty coverage, but hybrid battery and related component repairs may fall under the hybrid powertrain warranty if applicable.
What tools are needed to troubleshoot the P0B73 code in a Cadillac?
Tools typically include an OBDII scanner capable of reading hybrid system codes, a multimeter for electrical testing, and service manual wiring diagrams for the vehicle.
Can low voltage in the hybrid battery cause the P0B73 code?
Yes, low voltage or an imbalance in the battery cells can trigger the P0B73 code, as the system detects performance issues in the battery circuit.
How much does it cost to repair the P0B73 code on a Cadillac?
Repair costs can range from $200 for minor wiring repairs to over $4,000 for hybrid battery replacement, depending on the extent of the issue.
Discuss the causes and fixes for P0B73 Cadillac OBDII Code
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