AutoCodes – Generic – P1FD8

P1FD8 Code - Hybrid/EV Battery Interface Control Module 4 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: P1FD8 indicates Hybrid/EV Battery Interface Control Module 4 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 944

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 P1FD8 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 P1FD8 - Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P1FD8 Code - Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1FD8?

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 P1FD8?

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 P1FD8 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.

Need more information about the P1FD8 code?

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Need Help with the Code?

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Information for Specific Makes

P1FD8 Buick — Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit Low Voltage
P1FD8 Cadillac — Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit Low Voltage
P1FD8 Chevrolet — Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit Low Voltage
P1FD8 GMC — Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit Low Voltage
P1FD8 Saturn — Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit Low Voltage

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 P1FD8 Code

1. What are common symptoms of OBDII code P1FD8 related to the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit Low Voltage?

Common symptoms include a check engine light, reduced hybrid system performance, and potential issues with the battery charging system.

2. What are possible causes of OBDII code P1FD8?

Possible causes of this code include a faulty voltage sensor, issues with the battery interface control module, wiring problems, or a low state of charge in the hybrid/EV battery.

3. How can I diagnose the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit Low Voltage issue?

Diagnosis typically involves using a scan tool to retrieve the specific trouble code, checking the voltage sensor readings, inspecting the wiring connections, and testing the battery interface control module.

4. Can I still drive my vehicle with OBDII code P1FD8 present?

It is not recommended to ignore this code and continue driving, as it can lead to further damage to the hybrid/EV system. It is best to address the issue promptly.

5. How can I repair OBDII code P1FD8 on my vehicle?

Repair options may include replacing the faulty voltage sensor, repairing any damaged wiring, reprogramming the battery interface control module, or addressing any issues with the hybrid/EV battery.

6. Will OBDII code P1FD8 cause my vehicle to fail an emissions test?

Yes, this code can trigger a failure during an emissions test, as it indicates a problem with the hybrid/EV system that can impact emissions control.

7. Is it safe to attempt DIY repairs for OBDII code P1FD8?

If you have the necessary knowledge and experience working with hybrid/EV systems, you may attempt DIY repairs. However, it is recommended to consult a professional technician for accurate diagnosis and proper repairs.

8. How much does it typically cost to repair OBDII code P1FD8?

The cost of repair can vary depending on the specific issue causing the code, the vehicle make and model, and labor rates in your area. It is advisable to obtain quotes from different repair shops for an accurate estimate.

9. Can a low hybrid/EV battery state of charge trigger OBDII code P1FD8?

Yes, a low state of charge in the hybrid/EV battery can contribute to triggering this code, as it affects the voltage readings and performance of the battery interface control module.

10. Will resetting the OBDII code P1FD8 clear the issue permanently?

Resetting the code may temporarily clear the check engine light, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and repair the root cause of the problem to prevent further issues.