AutoCodes – RAM – U064A RAM

U064A RAM Code - Lost Communication With Hybrid/EV Battery Pack Current Sensor 'A'

Quick Answer

The Battery Pack Control Module (BPCM) is contained within the 48 volt Power Pack Unit (PPU). Common causes include Faulty Battery Pack Control Module (BPCM), Battery Pack Control Module (BPCM) harness is open or shorted, Battery Pack Control Module (BPCM) 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: U064A RAM indicates Lost Communication With Hybrid/EV Battery Pack Current Sensor 'A'.
Common causes: Common causes include Faulty Battery Pack Control Module (BPCM), Battery Pack Control Module (BPCM) harness is open or shorted, Battery Pack Control Module (BPCM) 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 575

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U064A RAM Description

The Battery Pack Control Module (BPCM) is contained within the 48 volt Power Pack Unit (PPU). The BPCM provides battery management and system functionality in conjunction with Cell Supervision Circuits (CSCs) that monitor and balance the battery cells as well as the monitoring of related external support systems. The CSCs are also located within the Battery Pack. The BPCM communicates with the vehicle via CAN-C bus. The main functions of the BPCM are to manage battery voltage and maintain the 12 volt battery system using battery pack current, voltage and temperature sensing capabilities. CAN communication is used to monitor other vehicle systems and for fault detection reporting. The Diagnostic Trouble Code (DTC) sets when the Battery Pack Control Module (BPCM) detects a fault with internal or external components or circuitry.

OBDII Code U064A RAM - Lost Communication With Hybrid/EV Battery Pack Current Sensor 'A' - AutoCodes.com — U064A RAM Code - Lost Communication With Hybrid/EV Battery Pack Current Sensor 'A'

What does this mean?

What are the Possible Causes of the DTC U064A RAM?

Faulty Battery Pack Control Module (BPCM)
Battery Pack Control Module (BPCM) harness is open or shorted
Battery Pack Control Module (BPCM) circuit poor electrical connection

How to Fix the DTC U064A RAM?

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 U064A RAM 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 U064A RAM Code

1. What does OBDII code U064A mean?

Code U064A indicates that the vehicle has lost communication with the Hybrid/EV Battery Pack Current Sensor 'A,' which monitors the flow of electrical current in the battery system.

2. What are the common symptoms of code U064A?

Symptoms may include the hybrid/EV system warning light, reduced fuel efficiency, limited performance in EV mode, or the vehicle entering a fail-safe or limp mode.

3. What causes code U064A to appear?

This code can be caused by a faulty current sensor, damaged wiring or connectors, a malfunctioning battery control module, or software issues in the vehicle's control systems.

4. Can I drive my car with code U064A active?

Driving with this code active is not recommended, as it may affect the performance and safety of the electric or hybrid system. Have the issue diagnosed and repaired promptly.

5. How can I fix code U064A?

Repair steps include inspecting the wiring and connectors to the current sensor, testing the sensor for proper function, updating control module software, or replacing faulty components if needed.

6. How is code U064A diagnosed?

A technician will use a scan tool to read the code, inspect the wiring and connectors for damage, test the sensor and associated circuits, and check for communication issues with the control module.

7. Is code U064A specific to RAM vehicles?

While U064A is a generic communication code, it is often associated with RAM vehicles' hybrid/EV systems. However, other manufacturers may also use this code for similar issues.

8. Could a dead 12-volt battery trigger code U064A?

Yes, a weak or dead 12-volt battery can cause communication errors like U064A by interrupting power to the control modules.

9. How much does it cost to repair code U064A?

Repair costs vary widely depending on the root cause, ranging from $100 for minor wiring repairs to $1,000 or more if the current sensor or control module needs replacement.

10. Can a software update fix code U064A?

In some cases, a software update for the battery control module may resolve communication issues and clear the code, especially if the problem is related to system programming.