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P1F0C Cadillac Code - Electric A/C Compressor Control Module A/C Compressor Motor Current Feedback Circuit Low Voltage

Quick Answer

The AC compressor function is to provide refrigerant flow in the AC refrigerant loop to help cool down the cabin, help dehumidify the air in a defrost mode and help maintain the battery temperature. Common causes include Faulty A/C Compressor, A/C Compressor harness is open or shorted, A/C Compressor 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: P1F0C Cadillac indicates Electric A/C Compressor Control Module A/C Compressor Motor Current Feedback Circuit Low Voltage.
Common causes: Common causes include Faulty A/C Compressor, A/C Compressor harness is open or shorted, A/C Compressor 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 961

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 P1F0C Cadillac Description

The AC compressor function is to provide refrigerant flow in the AC refrigerant loop to help cool down the cabin, help dehumidify the air in a defrost mode and help maintain the battery temperature. Rather than a more typical pulley, the A/C compressor uses a 3-phase alternating current, high voltage electric motor to operate. It has an on-board inverter that takes High Voltage direct current from the vehicle's High voltage battery and inverts it to alternating current for the motor. The AC compressor shall be activated when any of the three following events occur:
- The customer pushes the AC button
- The HVAC control, in AUTO mode, requests the electric AC compressor on to help in cooling the cabin or removing moisture in the defrost mode
- The High Voltage Battery Thermal System requests the AC compressor on to help maintain the battery temperature
The Hybrid/EV Powertrain Control Module 2 uses values from the A/C refrigerant pressure transducers, A/C refrigerant thermistor, duct temperature sensors, ambient air temperature sensor, passenger compartment temperature sensor, evaporator temperature sensor, battery cell temperature sensors, battery coolant temperature sensors and battery coolant pumps to determine the speed at which the compressor will operate. This message is sent from the Hybrid/EV Powertrain Control Module 2 to the A/C compressor control module via serial data message.
AC Compressor has a motor start up procedure that can take a variable length of time to run to bring the motor up to requested speed. Length of time is dependent on external conditions such as under-bonnet temperature and high side pressure. In hotter conditions, the motor start up time will be longer. The A/C compressor control module monitors an internal parameter known as the DC link current which is based off DC input current. It is not possible to measure this parameter externally.

OBDII Code P1F0C Cadillac - Electric A/C Compressor Control Module A/C Compressor Motor Current Feedback Circuit Low Voltage - AutoCodes.com — P1F0C Cadillac Code - Electric A/C Compressor Control Module A/C Compressor Motor Current Feedback Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1F0C Cadillac?

Faulty A/C Compressor
A/C Compressor harness is open or shorted
A/C Compressor circuit poor electrical connection

How to Fix the DTC P1F0C 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 P1F0C 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 P1F0C Cadillac Code

1. What are common symptoms of the OBDII code P1F0C in a Cadillac related to the Electric A/C Compressor Control Module A/C Compressor Motor Current Feedback Circuit Low Voltage?

- Common symptoms include weak or no cooling from the air conditioning system, the A/C compressor not engaging, and potential illumination of the Check Engine Light.

2. What are some possible causes of the Electric A/C Compressor Control Module A/C Compressor Motor Current Feedback Circuit Low Voltage code in a Cadillac?

- Possible causes include a faulty electric A/C compressor control module, issues with the A/C compressor motor, wiring problems, or low voltage in the circuit.

3. How can I diagnose the P1F0C code related to the A/C Compressor Motor Current Feedback Circuit Low Voltage in my Cadillac?

- Diagnosing this code may require using a professional OBDII scanner to retrieve the specific fault codes, checking the voltage levels in the circuit, inspecting the wiring for any damages, and testing the components involved in the A/C system.

4. What steps can I take to repair the Electric A/C Compressor Control Module A/C Compressor Motor Current Feedback Circuit Low Voltage issue in my Cadillac?

- Repair steps may include replacing the electric A/C compressor control module, addressing any wiring issues, testing and potentially replacing the A/C compressor motor, and clearing the fault codes from the vehicle's computer.

5. Is it safe to continue driving my Cadillac with the P1F0C code indicating low voltage in the A/C Compressor Motor Current Feedback Circuit?

- It is not recommended to ignore this code and continue driving, as it can lead to further damage to the A/C system and potentially affect the overall performance of the vehicle. It is best to address the issue promptly.

6. Can a DIY enthusiast with automotive knowledge fix the Electric A/C Compressor Control Module A/C Compressor Motor Current Feedback Circuit Low Voltage problem in a Cadillac?

- While some DIY enthusiasts may have the skills and tools to diagnose and repair this issue, it is recommended to consult a professional mechanic or authorized Cadillac service center for accurate diagnosis and proper repair.

7. How much does it typically cost to repair the P1F0C code related to the Electric A/C Compressor Control Module A/C Compressor Motor Current Feedback Circuit Low Voltage in a Cadillac?

- Repair costs can vary depending on the specific issue causing the code, the labor rates in your area, and the cost of any necessary replacement parts. It is advisable to obtain estimates from different service providers.

8. Are there any preventive maintenance measures to reduce the likelihood of encountering the Electric A/C Compressor Control Module A/C Compressor Motor Current Feedback Circuit Low Voltage code in a Cadillac?

- Regular maintenance of the A/C system, including checking the wiring and connections, monitoring the voltage levels, and addressing any issues promptly, can help reduce the chances of encountering this code.