AutoCodes – Buick – P1F0B Buick

P1F0B Buick Code - A/C Compressor Motor Start-Up Current 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: P1F0B Buick indicates A/C Compressor Motor Start-Up Current 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 802

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 P1F0B Buick 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 P1F0B Buick - A/C Compressor Motor Start-Up Current Performance - AutoCodes.com — P1F0B Buick Code - A/C Compressor Motor Start-Up Current Performance

What does this mean?

What are the Possible Causes of the DTC P1F0B Buick?

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

How to Fix the DTC P1F0B Buick?

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 P1F0B Buick 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 P1F0B Buick Code

1. What are the common symptoms of OBDII code P1F0B related to A/C Compressor Motor Start-Up Current Performance?

- Common symptoms include reduced cooling performance from the A/C system, frequent A/C compressor cycling, and potential illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P1F0B in a Buick indicating A/C Compressor Motor Start-Up Current Performance issues?

- Potential causes may include a faulty A/C compressor motor, wiring issues, a failing compressor clutch, or problems with the A/C control module.

3. How can I diagnose the OBDII code P1F0B related to A/C Compressor Motor Start-Up Current Performance in my Buick?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the code, conducting a visual inspection of the A/C system components, and performing electrical tests on the compressor motor.

4. What are some repair tips for addressing OBDII code P1F0B in a Buick associated with A/C Compressor Motor Start-Up Current Performance?

- Repair tips may include checking and repairing any damaged wiring, replacing the A/C compressor motor or clutch if necessary, and ensuring proper refrigerant levels in the system.

5. Can OBDII code P1F0B related to A/C Compressor Motor Start-Up Current Performance be safely ignored?

- Ignoring this code can lead to further A/C system damage and reduced cooling performance. It is recommended to address the underlying issue promptly to prevent more significant problems.

6. Is it possible to reset OBDII code P1F0B related to A/C Compressor Motor Start-Up Current Performance without addressing the root cause?

- While clearing the code may temporarily turn off the Check Engine Light, the underlying issue causing the code will persist. It's essential to diagnose and repair the problem to prevent reoccurrence.

7. How much does it typically cost to repair OBDII code P1F0B indicating A/C Compressor Motor Start-Up Current Performance in a Buick?

- Repair costs can vary depending on the specific issue causing the code, but they may range from a few hundred to a thousand dollars, including parts and labor.

8. Can a DIY enthusiast with automotive experience tackle the repair of OBDII code P1F0B related to A/C Compressor Motor Start-Up Current Performance?

- Depending on the individual's skill level, diagnosing and repairing this code may be possible. However, complex electrical and A/C system repairs are best left to professionals to ensure proper resolution.

9. Will driving with OBDII code P1F0B related to A/C Compressor Motor Start-Up Current Performance damage other vehicle components?

- Continuing to drive with this code present can potentially lead to further A/C system damage, increased repair costs, and reduced comfort due to inadequate cooling performance.

10. How long does it typically take to repair OBDII code P1F0B associated with A/C Compressor Motor Start-Up Current Performance?

- The repair time can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day for a professional mechanic to diagnose and fix the problem.