AutoCodes – Generic – P1DFF

P1DFF Code - Battery Condition Monitor Module Relay B Stuck On

Quick Answer

The battery condition monitor module commands IGHLDB relay to turn ON or permit it to turn OFF. Common causes include Faulty Battery Condition Monitor Module Relay B, Battery Condition Monitor Module Relay B harness is open or shorted, Battery Condition Monitor Module Relay B 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: P1DFF indicates Battery Condition Monitor Module Relay B Stuck On.
Common causes: Common causes include Faulty Battery Condition Monitor Module Relay B, Battery Condition Monitor Module Relay B harness is open or shorted, Battery Condition Monitor Module Relay B 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,069

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 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1DFF Description

The battery condition monitor module commands IGHLDB relay to turn ON or permit it to turn OFF. Normally, when IGHLDB relay is OFF, the battery condition monitor module is in sleep mode. When the battery condition monitor module remains powered for a specified duration after the battery condition monitor module commands IGHLDB relay to turn OFF, a malfunction is detected and a DTC is stored.

OBDII Code P1DFF - Battery Condition Monitor Module Relay B Stuck On - AutoCodes.com — P1DFF Code - Battery Condition Monitor Module Relay B Stuck On

What does this mean?

What are the Possible Causes of the DTC P1DFF?

Faulty Battery Condition Monitor Module Relay B
Battery Condition Monitor Module Relay B harness is open or shorted
Battery Condition Monitor Module Relay B circuit poor electrical connection

How to Fix the DTC P1DFF?

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 P1DFF 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 P1DFF code?

Need more information on how to fix the P1DFF code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1DFF code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1DFF Acura — Battery Condition Monitor Module Relay B Stuck On
P1DFF Honda — Battery Condition Monitor Module Relay B Stuck On

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 P1DFF Code

1. What does OBDII code P1DFF mean?

Code P1DFF indicates that the Battery Condition Monitor Module Relay B is stuck in the "on" position, which is detected by the vehicle's powertrain control module.

2. What are the common symptoms of code P1DFF?

Symptoms may include a check engine light, irregular battery charging behavior, or issues with the vehicle's electrical system.

3. What causes the P1DFF code to appear?

Common causes include a faulty Battery Condition Monitor Module, a stuck relay, damaged wiring, or poor electrical connections in the module circuit.

4. Can I still drive my car with code P1DFF?

While the vehicle may still be drivable, continuing to drive with this code can lead to battery issues, electrical malfunctions, or further damage to the monitoring system.

5. How is the P1DFF code diagnosed?

A mechanic will typically use a scan tool to verify the code, inspect the Battery Condition Monitor Module, check the relay's functionality, and test the wiring and connections.

6. How do you fix the P1DFF code?

Repairs may involve replacing the stuck relay, repairing damaged wiring, cleaning corroded connections, or replacing the Battery Condition Monitor Module if it is defective.

7. How much does it cost to fix the P1DFF code?

Repair costs can vary, but replacing a relay typically costs $50-$150, while replacing the Battery Condition Monitor Module can range from $200 to $500, depending on the vehicle.

8. Can a dead or weak battery cause the P1DFF code?

A weak or dead battery is unlikely to directly cause this code, but it may exacerbate issues with the Battery Condition Monitor Module or its relay.

9. Will clearing the P1DFF code fix the issue?

Clearing the code may temporarily turn off the check engine light, but the issue will return unless the underlying problem is resolved.

10. Can I fix the P1DFF code myself?

If you have automotive electrical knowledge, you can inspect the relay, wiring, and connections. However, complex repairs or module replacements may require professional assistance.