AutoCodes – Generic – P1D01

P1D01 Code - All CAN Malfunction Battery Condition Monitor Module - Traction Motor Control Module

Quick Answer

The battery control processor is in the battery condition monitor module. Common causes include Faulty Battery Condition Monitor Module, Battery Condition Monitor Module harness is open or shorted, Battery Condition Monitor 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: P1D01 indicates All CAN Malfunction Battery Condition Monitor Module - Traction Motor Control Module.
Common causes: Common causes include Faulty Battery Condition Monitor Module, Battery Condition Monitor Module harness is open or shorted, Battery Condition Monitor 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 4,437

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 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1D01 Description

The battery control processor is in the battery condition monitor module. The controller area network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (F-CAN A_H and F-CAN A_L) and (EPP-CAN_H and EPP-CAN_L). The F-CAN and the EPP-CAN sends same data. If the F-CAN or the EPP-CAN does not transmit/receive data, the normal signal line can transmit/receive data. If the F-CAN and the EPP-CAN does not transmit/receive data, the battery condition monitor module cannot run normally. The battery condition monitor module detects no signal, received data is abnormal or BUS-OFF is received via the F-CAN and EPP-CAN, the battery condition monitor module detects a malfunction and stores a DTC.

OBDII Code P1D01 - All CAN Malfunction Battery Condition Monitor Module - Traction Motor Control Module - AutoCodes.com — P1D01 Code - All CAN Malfunction Battery Condition Monitor Module - Traction Motor Control Module

What does this mean?

What are the Possible Causes of the DTC P1D01?

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

How to Fix the DTC P1D01?

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 P1D01 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 P1D01 code?

Need more information on how to fix the P1D01 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P1D01 Acura — All CAN Malfunction Battery Condition Monitor Module - Traction Motor Control Module
P1D01 Honda — All CAN Malfunction Battery Condition Monitor Module - Traction Motor Control Module

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 P1D01 Code

1. What does the OBDII code P1D01 mean?

P1D01 indicates a communication issue between the Battery Condition Monitor Module (BCMM) and the Traction Motor Control Module (TMCM) over the Controller Area Network (CAN).

2. What are the common symptoms of the P1D01 code?

Symptoms may include an illuminated check engine light, reduced hybrid or EV performance, vehicle not entering EV mode, or difficulty starting.

3. What causes the P1D01 code to appear?

Common causes include a faulty CAN bus connection, damaged wiring or connectors, a malfunctioning BCMM or TMCM, or software issues in one of the modules.

4. Can a weak battery cause the P1D01 code?

Yes, a weak or failing 12V auxiliary battery can sometimes disrupt module communication and trigger the P1D01 code.

5. How is the P1D01 code diagnosed?

A technician will use a scan tool to confirm the code, inspect CAN bus wiring for damage, check module connections, and test the functionality of the BCMM and TMCM.

6. Can I drive with the P1D01 code?

Driving with this code can lead to reduced performance or further damage, especially in hybrid or EV systems. Itâ€™s best to address the issue promptly.

7. How do you fix the P1D01 code?

Repairs may involve fixing or replacing damaged CAN bus wiring, cleaning or reconnecting module connectors, reprogramming software, or replacing a faulty module.

8. Can clearing the P1D01 code solve the issue?

Clearing the code may temporarily reset the system, but the issue will likely recur unless the underlying problem is resolved.

9. How much does it cost to fix the P1D01 code?

Repair costs vary depending on the issue, ranging from $100 for simple wiring repairs to $1,000 or more if a module replacement is required.

10. Is the P1D01 code specific to any vehicle brand?

This code is often seen in hybrid or electric vehicles from manufacturers like Honda, but it can apply to other brands with similar systems. Always consult your vehicleâ€™s service manual for specifics.