AutoCodes – Cadillac – P1F64 Cadillac

P1F64 Cadillac Code - Hybrid/EV System Voltage Discharge Circuit Low Voltage

Quick Answer

This is an internal fault detection of the power inverter module, often referred to as the drive motor generator power inverter module. Common causes include Faulty Power Inverter Module, Power Inverter Module harness is open or shorted, Power Inverter 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: P1F64 Cadillac indicates Hybrid/EV System Voltage Discharge Circuit Low Voltage.
Common causes: Common causes include Faulty Power Inverter Module, Power Inverter Module harness is open or shorted, Power Inverter 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 1,008

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 P1F64 Cadillac Description

This is an internal fault detection of the power inverter module, often referred to as the drive motor generator power inverter module. This fault is handled inside the power inverter module, and no external circuits are involved.

OBDII Code P1F64 Cadillac - Hybrid/EV System Voltage Discharge Circuit Low Voltage - AutoCodes.com — P1F64 Cadillac Code - Hybrid/EV System Voltage Discharge Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1F64 Cadillac?

Faulty Power Inverter Module
Power Inverter Module harness is open or shorted
Power Inverter Module circuit poor electrical connection

How to Fix the DTC P1F64 Cadillac?

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 P1F64 Cadillac 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 P1F64 Cadillac Code

1. What does the OBDII code P1F64 mean on a Cadillac?

P1F64 indicates a "Hybrid/EV System Voltage Discharge Circuit Low Voltage," meaning the voltage discharge circuit in the hybrid or electric vehicle system is not operating within the expected range.

2. What are common symptoms of the P1F64 code in a Cadillac?

Common symptoms include the check engine light or hybrid system warning light, reduced hybrid/EV performance, and possible difficulty starting the vehicle.

3. What causes the P1F64 code to appear?

Possible causes include a faulty voltage discharge resistor, damaged wiring or connectors in the discharge circuit, or issues with the hybrid/EV power control module.

4. Can driving with the P1F64 code damage my Cadillac?

Yes, continued driving with this code can lead to further damage to the hybrid/EV system or even a potential safety hazard if the voltage discharge circuit fails completely.

5. How is the P1F64 code diagnosed?

A technician will use a scan tool to check for related codes, inspect the voltage discharge circuit and components, and test the wiring and connectors for faults.

6. What repairs are needed for the P1F64 code?

Repairs may include replacing the voltage discharge resistor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the hybrid/EV power control module.

7. How much does it cost to fix the P1F64 code on a Cadillac?

Repair costs vary but may range from $200 to $1,000 or more, depending on the exact issue and labor involved.

8. Can I clear the P1F64 code myself?

You can clear the code using an OBDII scanner, but this does not fix the underlying problem, and the code will likely return if the issue is not resolved.

9. Is the P1F64 code unique to Cadillacs?

No, other GM hybrid/EV vehicles may also experience this code, but its specifics can vary depending on the model and system design.

10. How can I prevent the P1F64 code from recurring?

Regular maintenance of the hybrid/EV system, inspecting wiring and connectors, and addressing issues promptly can help prevent this code from recurring.