AutoCodes – Generic – P1FDF

P1FDF 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 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 847

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

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?

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 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 P1FDF code?

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Information for Specific Makes

P1FDF Buick — Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage
P1FDF Cadillac — Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage
P1FDF Chevrolet — Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage
P1FDF GMC — Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage
P1FDF Saturn — Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High 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 P1FDF Code

1. What are common symptoms of OBDII code P1FDF (Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage)?

Symptoms may include the hybrid/EV system not functioning properly, reduced fuel efficiency, warning lights illuminated on the dashboard, and potential vehicle stalling.

2. What can cause the OBDII code P1FDF to trigger?

The code P1FDF is typically triggered by a high voltage reading detected by the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor, indicating a potential issue with the voltage sensor circuit.

3. How serious is the OBDII code P1FDF related to the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage?

The code P1FDF should be taken seriously as it can impact the performance and safety of the hybrid/EV vehicle. It is recommended to address this issue promptly to prevent further complications.

4. Are there any safety concerns associated with OBDII code P1FDF?

Yes, since the code P1FDF relates to the high voltage sensor circuit in the hybrid/EV system, there may be safety concerns regarding the electrical components. It is advisable to seek professional assistance for diagnosis and repair.

5. How can I diagnose the OBDII code P1FDF at home?

Diagnosing the code P1FDF may require specialized diagnostic tools and knowledge of hybrid/EV systems. It is recommended to consult a professional mechanic or dealership with experience in hybrid/EV vehicles for accurate diagnosis.

6. What are some possible repair tips for resolving OBDII code P1FDF?

Repair tips may include checking the wiring and connections related to the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor, inspecting for any damage or corrosion, and resetting the code after addressing any identified issues.

7. Can driving with the OBDII code P1FDF present cause further damage to the vehicle?

Continuing to drive with the code P1FDF present may potentially cause further damage to the hybrid/EV system and lead to more serious issues over time. It is recommended to address the problem as soon as possible.

8. Will resetting the OBDII code P1FDF make it go away permanently?

Resetting the code P1FDF may clear it temporarily, but if the underlying issue causing the high voltage sensor circuit problem is not fixed, the code is likely to reappear. It is crucial to diagnose and address the root cause of the problem.

9. How much does it typically cost to repair OBDII code P1FDF in a hybrid or electric vehicle?

The cost of repairing the code P1FDF can vary depending on the specific issue causing the fault, the labor rates of the repair facility, and the cost of any necessary parts. It is advisable to obtain quotes from different sources for an accurate estimate.

10. Can I drive my hybrid/EV vehicle with the OBDII code P1FDF present?

It is not recommended to drive the vehicle with the code P1FDF present, as it may indicate a potential issue with the high voltage sensor circuit, impacting the performance and safety of the hybrid/EV system. It is best to have the vehicle inspected and repaired before driving again.