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P3045 Cadillac Code - Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Performance Circuit/System Description

Quick Answer

The hybrid battery contains 192 individual cells. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface 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: P3045 Cadillac indicates Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Performance Circuit/System Description.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface 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.

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Code Popularity 923

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P3045 Cadillac Description

The hybrid battery contains 192 individual cells. Two cells are welded together in parallel and called a cell group. There are a total of 96 cell groups in the hybrid battery assembly. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cell groups are joined to form 3 distinct sections. The first 24 battery cell groups make up battery section 1. This section is adjacent to the cowl and contains battery cell groups 73 through 96. The next 28 battery cell groups make up battery section 2. This section is located behind section 1 and contains battery cell groups 45 through 72. The transverse battery section is section number 3 and it contains the remaining 44 battery cell groups 1 through 44. The battery sections also contain two temperature sensors, with one sensor located at each end of the section.
The battery energy control module monitors the voltage of the 96 battery cell groups. The voltage sense lines are attached to each individual cell group, and these sense lines terminate at a connector located on the top surface of the battery section. A voltage sense harness joins this connector to the battery energy control module.
The battery energy control module contains internal interface control modules that monitor specific cell groups.
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 the hybrid powertrain control module 2 through serial data. The hybrid powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P3045 Cadillac - Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Performance Circuit/System Description - AutoCodes.com — P3045 Cadillac Code - Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Performance Circuit/System Description

What does this mean?

What are the Possible Causes of the DTC P3045 Cadillac?

Faulty Hybrid/EV Battery Interface Control Module
Hybrid/EV Battery Interface Control Module harness is open or shorted
Hybrid/EV Battery Interface Control Module circuit poor electrical connection

How to Fix the DTC P3045 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 P3045 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P3045 Cadillac Code

1. What are the common symptoms of OBDII code P3045 in a Cadillac Hybrid/EV related to the Hybrid/EV Battery Interface Control Module 12 Voltage Sensor Circuit Performance?

- Common symptoms may include poor fuel economy, reduced engine performance, and in some cases, the vehicle may go into a reduced power or limp mode.

2. What can cause OBDII code P3045 to trigger in a Cadillac Hybrid/EV?

- The code can be triggered by issues such as a faulty Hybrid/EV Battery Interface Control Module, a malfunctioning 12-voltage sensor, wiring problems, or a weak battery.

3. How serious is OBDII code P3045 in a Cadillac Hybrid/EV?

- This code should be addressed promptly to avoid any potential damage to the hybrid/EV system. Continuing to drive with this code present may lead to further performance issues.

4. How can I diagnose OBDII code P3045 in my Cadillac Hybrid/EV?

- Diagnosis typically involves using a professional OBDII scanner to read the code, followed by thorough inspection of the Hybrid/EV Battery Interface Control Module, 12-voltage sensor, and related wiring for any visible damage or issues.

5. Can I repair OBDII code P3045 in my Cadillac Hybrid/EV myself?

- While some may attempt to troubleshoot and repair this code themselves, it is recommended to seek assistance from a qualified technician or dealership due to the complexity of the hybrid/EV system.

6. Are there any tips for preventing OBDII code P3045 in a Cadillac Hybrid/EV?

- Regular maintenance and inspections of the hybrid/EV system, including the battery interface control module and sensors, can help prevent issues that may lead to this code.

7. How much does it typically cost to repair OBDII code P3045 in a Cadillac Hybrid/EV?

- The cost of repairs can vary depending on the exact cause of the issue. It is advisable to get a diagnostic from a professional to determine the specific repairs needed.

8. Can OBDII code P3045 in a Cadillac Hybrid/EV cause damage if ignored?

- Ignoring this code may lead to further damage to the hybrid/EV system, potentially resulting in more costly repairs down the line.

9. Will OBDII code P3045 in a Cadillac Hybrid/EV affect the vehicle's ability to start?

- In some cases, persistent issues related to this code may impact the vehicle's ability to start, especially if the hybrid/EV system is compromised.

10. Is it safe to continue driving with OBDII code P3045 present in a Cadillac Hybrid/EV?

- It is not recommended to continue driving with this code present, as it can affect the performance and safety of the vehicle. It is best to address the issue promptly.