AutoCodes – Generic – P1F56

P1F56 Code - Hybrid/EV Battery Pack Coolant Control Valve Stuck

Quick Answer

The hybrid/EV battery pack coolant control valve drive circuit in the hybrid/EV powertrain control module 2 is two control circuit, terminal 1 (Drive A) and terminal 2 (Drive B), that can drive the valve motor in a forward or reverse direction. Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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: P1F56 indicates Hybrid/EV Battery Pack Coolant Control Valve Stuck.
Common causes: Common causes include Faulty Hybrid/EV Powertrain Control Module 2, Hybrid/EV Powertrain Control Module 2 harness is open or shorted, Hybrid/EV Powertrain Control Module 2 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 2,809

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 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1F56 Description

The hybrid/EV battery pack coolant control valve drive circuit in the hybrid/EV powertrain control module 2 is two control circuit, terminal 1 (Drive A) and terminal 2 (Drive B), that can drive the valve motor in a forward or reverse direction. One end position of the range is the Radiator connection, the middle position is the bypass position and the other end is the chiller position.

OBDII Code P1F56 - Hybrid/EV Battery Pack Coolant Control Valve Stuck - AutoCodes.com — P1F56 Code - Hybrid/EV Battery Pack Coolant Control Valve Stuck

What does this mean?

What are the Possible Causes of the DTC P1F56?

Faulty Hybrid/EV Powertrain Control Module 2
Hybrid/EV Powertrain Control Module 2 harness is open or shorted
Hybrid/EV Powertrain Control Module 2 circuit poor electrical connection

How to Fix the DTC P1F56?

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 P1F56 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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Information for Specific Makes

P1F56 Buick — Hybrid/EV Battery Pack Coolant Control Valve Stuck
P1F56 Cadillac — Hybrid/EV Battery Pack Coolant Control Valve Stuck
P1F56 Chevrolet — Hybrid/EV Battery Pack Coolant Control Valve Stuck
P1F56 GMC — Hybrid/EV Battery Pack Coolant Control Valve Stuck
P1F56 Saturn — Hybrid/EV Battery Pack Coolant Control Valve Stuck

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 P1F56 Code

1. What does the OBDII code P1F56 mean?

The P1F56 code indicates that the hybrid or EV battery pack coolant control valve is stuck, which can affect the cooling system's ability to regulate battery temperature.

2. What are the symptoms of a P1F56 code?

Common symptoms include an illuminated Check Engine Light, reduced hybrid or EV performance, overheating of the battery pack, or the vehicle entering limp mode.

3. What causes the P1F56 code to appear?

The code is typically caused by a faulty coolant control valve, debris or contamination in the valve, wiring issues, or a malfunction in the coolant pump system.

4. Is it safe to drive with a P1F56 code?

Driving with this code is not recommended, as an improperly cooled battery pack can overheat and potentially lead to reduced performance or damage.

5. How do I diagnose the P1F56 code?

Diagnosis involves inspecting the coolant control valve for sticking or blockage, checking for electrical issues like damaged wiring or connectors, and ensuring the coolant system is functioning properly.

6. Can a P1F56 code be caused by low coolant levels?

Yes, low coolant levels can contribute to this issue by causing the control valve to operate improperly or fail to regulate flow.

7. How do you fix a P1F56 code?

Repairs may include replacing the coolant control valve, cleaning the valve if debris is present, repairing damaged wiring, or refilling and bleeding the coolant system.

8. How much does it cost to fix a P1F56 code?

The repair cost varies but typically ranges from $200 to $500, depending on whether the coolant control valve needs replacement and labor charges.

9. Can a software issue trigger a P1F56 code?

While less common, a software or control module malfunction could potentially cause the code and may require a module reprogramming or update.

10. How can I prevent a P1F56 code from occurring again?

Regular maintenance, including checking coolant levels, ensuring the coolant is clean, and inspecting the cooling system components, can help prevent this issue.