AutoCodes – Cadillac – P1FD7 Cadillac

P1FD7 Cadillac Code - Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit Low Voltage

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: P1FD7 Cadillac indicates Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit Low Voltage.
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 834

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 Apr 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1FD7 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 P1FD7 Cadillac - Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P1FD7 Cadillac Code - Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1FD7 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 P1FD7 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 P1FD7 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 P1FD7 Cadillac Code

1. What does OBDII code P1FD7 mean on a Cadillac?

Code P1FD7 indicates a low voltage issue in the Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit.

2. What are the symptoms of code P1FD7 in a Cadillac?

Common symptoms include warning lights on the dashboard, reduced hybrid/EV performance, and potential drivability issues.

3. What causes code P1FD7 on a Cadillac?

This code is typically caused by a faulty voltage sensor, damaged wiring or connectors, or a malfunctioning battery interface control module.

4. Can I drive my Cadillac with code P1FD7 active?

Driving with this code is not recommended, as it may impact the performance of the hybrid/EV system and cause further damage.

5. How do I diagnose code P1FD7 on a Cadillac?

Diagnosis involves inspecting the voltage sensor, checking the wiring and connectors for damage, and testing the battery interface control module with a scan tool.

6. How is code P1FD7 fixed on a Cadillac?

Repairs may include replacing the voltage sensor, repairing damaged wiring, or replacing the battery interface control module if necessary.

7. Is code P1FD7 specific to Cadillacs?

While this code can appear on other vehicles, it is specific to hybrid/EV systems and may have unique repair procedures for Cadillac models.

8. What tools are needed to troubleshoot code P1FD7?

Youâ€™ll need an OBDII scanner, a multimeter to test electrical circuits, and potentially manufacturer-specific diagnostic tools for hybrid/EV systems.

9. Could a dead 12V battery cause code P1FD7?

While unlikely, a weak or failing 12V battery may indirectly affect the hybrid/EV system and should be ruled out during diagnosis.

10. How much does it cost to repair code P1FD7 on a Cadillac?

Repair costs vary depending on the issue but may range from $200 for wiring repairs to over $1,000 if the battery interface control module needs replacement.