AutoCodes – GMC – P1F0B GMC

P1F0B GMC 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 GMC 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 785

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

What does this mean?

What are the Possible Causes of the DTC P1F0B GMC?

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 GMC?

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 GMC 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 GMC Code

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

- Common symptoms include issues with the air conditioning system not cooling properly, unusual noises coming from the A/C compressor, and the A/C system not engaging properly.

2. What are some potential causes of OBDII code P1F0B related to A/C Compressor Motor Start-Up Current Performance in a GMC?

- Possible causes may include a faulty A/C compressor motor, wiring issues, a malfunctioning compressor clutch, low refrigerant levels, or a problem with the A/C compressor relay.

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

- To diagnose this code, it is recommended to use an OBDII scanner to retrieve the specific fault code and then inspect the A/C compressor motor, wiring connections, compressor clutch, and related components for any visible signs of damage or wear.

4. What are some repair tips for resolving OBDII code P1F0B concerning A/C Compressor Motor Start-Up Current Performance in a GMC?

- Repair tips may include checking and repairing any damaged wiring, replacing a faulty A/C compressor motor or compressor clutch, ensuring proper refrigerant levels, and resetting the fault code after completing repairs.

5. Can I continue driving my GMC with OBDII code P1F0B related to A/C Compressor Motor Start-Up Current Performance?

- It is not recommended to continue driving your GMC with this fault code unresolved, as it can lead to further damage to the A/C system and potential issues with cooling performance. It is best to address the problem promptly.

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

- The cost of repairs can vary depending on the specific cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.

7. Is it possible to reset the OBDII code P1F0B in a GMC related to A/C Compressor Motor Start-Up Current Performance without repairs?

- While you can clear the fault code using an OBDII scanner, it is important to address the underlying issue causing the code to prevent further problems with the A/C system.

8. How can regular maintenance help prevent OBDII code P1F0B related to A/C Compressor Motor Start-Up Current Performance in a GMC?

- Regular maintenance such as checking and replacing the A/C system components, ensuring proper refrigerant levels, and addressing any unusual noises or issues promptly can help prevent this fault code from occurring.