AutoCodes – Generic – P1F0A

P1F0A Code - A/C Compressor Motor Speed Performance

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: P1F0A indicates A/C Compressor Motor Speed Performance.
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 2,227

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 P1F0A 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 P1F0A - A/C Compressor Motor Speed Performance - AutoCodes.com — P1F0A Code - A/C Compressor Motor Speed Performance

What does this mean?

What are the Possible Causes of the DTC P1F0A?

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

How to Fix the DTC P1F0A?

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 P1F0A 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 P1F0A code?

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Information for Specific Makes

P1F0A Buick — A/C Compressor Motor Speed Performance
P1F0A Cadillac — A/C Compressor Motor Speed Performance
P1F0A Chevrolet — A/C Compressor Motor Speed Performance
P1F0A GMC — A/C Compressor Motor Speed Performance
P1F0A Saturn — A/C Compressor Motor Speed Performance

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 P1F0A Code

1. What are the common symptoms of OBDII code P1F0A related to A/C compressor motor speed performance?

- Common symptoms include reduced cooling performance, abnormal noises from the A/C system, and the A/C compressor not engaging properly.

2. What are the possible causes of OBDII code P1F0A indicating A/C compressor motor speed performance issues?

- Causes can include a faulty A/C compressor motor, issues with the motor control module, electrical wiring problems, or low refrigerant levels.

3. How can I diagnose the root cause of OBDII code P1F0A in relation to A/C compressor motor speed performance?

- Diagnosis typically involves conducting a thorough inspection of the A/C compressor, checking the electrical connections, testing the motor control module, and verifying refrigerant levels.

4. Can I continue driving my vehicle with OBDII code P1F0A triggered for A/C compressor motor speed performance?

- It is not recommended to continue driving with this code active, as it can lead to further damage to the A/C system and potentially cause overheating issues in the vehicle.

5. What are some repair tips for fixing OBDII code P1F0A associated with A/C compressor motor speed performance?

- Repair tips may include replacing the A/C compressor motor, repairing any damaged wiring, resetting the fault codes, and ensuring proper refrigerant levels.

6. How much does it typically cost to repair OBDII code P1F0A concerning A/C compressor motor speed performance?

- Repair costs can vary depending on the extent of the issue, but they may range from $200 to $800, including parts and labor.

7. Is it possible to reset OBDII code P1F0A related to A/C compressor motor speed performance without making any repairs?

- While you can clear the fault code temporarily, it is crucial to address the underlying issue to prevent further A/C system problems and potential damage.

8. What are the long-term consequences of ignoring OBDII code P1F0A linked to A/C compressor motor speed performance?

- Ignoring this code can lead to complete A/C system failure, increased fuel consumption due to inefficiency, and potential damage to other components in the system.

9. Can a DIY enthusiast fix OBDII code P1F0A for A/C compressor motor speed performance, or is it best left to professionals?

- While some basic troubleshooting can be done by DIY enthusiasts, diagnosing and repairing this code often requires specialized tools and expertise, so it is recommended to consult a professional mechanic.

10. How can I prevent OBDII code P1F0A from recurring in the future after fixing A/C compressor motor speed performance issues?

- Regular maintenance of the A/C system, checking refrigerant levels, inspecting electrical connections, and addressing any issues promptly can help prevent the recurrence of this fault code.