AutoCodes – GMC – P1FDF GMC

P1FDF GMC Code - Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High 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: P1FDF GMC indicates Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High 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 771

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 P1FDF GMC 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 P1FDF GMC - Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage - AutoCodes.com — P1FDF GMC Code - Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1FDF GMC?

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 P1FDF GMC?

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 P1FDF GMC 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 P1FDF GMC Code

1. What are the common symptoms of OBDII code P1FDF in a GMC related to the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage?

- Common symptoms include illuminated Check Engine Light, reduced hybrid/EV performance, and potential drivability issues.

2. What are the possible causes of the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage fault code in a GMC?

- Possible causes include a faulty hybrid/EV battery voltage sensor, wiring issues, poor electrical connections, or a malfunctioning battery control module.

3. How can I diagnose the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage issue in my GMC?

- Diagnosis typically involves using a scan tool to read the OBDII code, checking the voltage sensor circuit for continuity and proper voltage levels, and inspecting the wiring and connectors for damage.

4. Are there any safety concerns associated with driving a GMC when the P1FDF code related to the hybrid/EV battery voltage sensor circuit is present?

- It is recommended to address the issue promptly to avoid potential damage to the hybrid/EV system and ensure safe operation of the vehicle.

5. Can I still drive my GMC with the OBDII code P1FDF indicating a high voltage sensor circuit issue?

- While the vehicle may still be drivable, it is advisable to limit driving and seek professional diagnosis and repair to prevent further damage to the hybrid/EV system.

6. What are some repair tips for resolving the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage problem in a GMC?

- Repair tips may include replacing the faulty voltage sensor, repairing or replacing damaged wiring, ensuring proper electrical connections, and resetting the fault code with a scan tool after repairs.

7. How critical is it to address the P1FDF code related to the high voltage sensor circuit in a GMC?

- It is important to address the issue promptly to prevent potential damage to the hybrid/EV system, ensure optimal vehicle performance, and maintain safe driving conditions.

8. Can a DIY enthusiast with automotive repair experience fix the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage issue in a GMC?

- While some experienced DIYers may attempt the repair, it is recommended to consult a professional technician or specialized hybrid/EV mechanic for accurate diagnosis and proper repair.

9. Will resetting the OBDII code P1FDF related to the high voltage sensor circuit in a GMC solve the underlying issue?

- Simply resetting the fault code may temporarily clear the Check Engine Light, but it will not fix the root cause of the problem. Proper diagnosis and repair are necessary to resolve the issue.

10. How much can I expect to pay for repairing the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage fault in a GMC?

- Repair costs can vary depending on the exact cause of the issue, but expect to budget for parts and labor expenses associated with replacing the voltage sensor, repairing wiring, or addressing control module issues.