AutoCodes – GMC – P1FDD GMC

P1FDD GMC Code - Hybrid/EV Battery Interface Control Module 9 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: P1FDD GMC indicates Hybrid/EV Battery Interface Control Module 9 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 775

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 P1FDD 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 P1FDD GMC - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P1FDD GMC Code - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1FDD 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 P1FDD 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 P1FDD 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 P1FDD GMC Code

1. What are the common symptoms of OBDII code P1FDD GMC (Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage)?

Common symptoms include reduced hybrid/EV system performance, poor fuel efficiency, and possible illumination of the check engine light.

2. What are the possible causes of OBDII code P1FDD GMC?

Possible causes include a malfunctioning Hybrid/EV Battery Interface Control Module 9, issues with the voltage sensor circuit, low battery voltage, or faulty wiring.

3. How can I diagnose OBDII code P1FDD GMC?

Diagnosis typically involves using a diagnostic scanner to read the code, checking the voltage sensor circuit for any visible damage, and testing the battery voltage levels.

4. Can I continue driving my vehicle with OBDII code P1FDD GMC?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/EV system and potentially affect vehicle performance.

5. How can I repair OBDII code P1FDD GMC?

Repair options may include replacing the Hybrid/EV Battery Interface Control Module 9, repairing or replacing the voltage sensor circuit, ensuring proper battery voltage levels, and addressing any wiring issues.

6. Is it safe to reset the OBDII code P1FDD GMC without addressing the underlying issue?

Resetting the code without fixing the underlying problem may temporarily turn off the check engine light, but the issue will likely reoccur and could lead to more severe problems in the future.

7. Can a DIY enthusiast fix OBDII code P1FDD GMC at home?

While some basic diagnosis and repairs can be done at home, addressing OBDII code P1FDD GMC may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

8. How much does it cost to repair OBDII code P1FDD GMC at a dealership or repair shop?

The cost of repairing this code can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Are there any recalls or technical service bulletins related to OBDII code P1FDD GMC?

It is advisable to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins related to this specific OBDII code to see if there are any known issues or remedies.

10. How can I prevent OBDII code P1FDD GMC from occurring in the future?

Regular maintenance of the hybrid/EV system, checking the battery voltage levels, and addressing any electrical issues promptly can help prevent the occurrence of OBDII code P1FDD GMC.