P1F0C Buick 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 Buick 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.
Code P1F0C Buick Description
- 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.
What are the Possible Causes of the DTC P1F0C 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 P1F0C 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 P1F0C 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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Frequently Asked Questions about P1F0C Buick Code
1. What does the OBDII code P1F0C mean on a Buick?
P1F0C indicates that the Electric A/C Compressor Control Module has detected a low voltage issue in the A/C compressor motor current feedback circuit.
2. What are the common symptoms of the P1F0C code?
Symptoms may include reduced or no air conditioning performance, the A/C system not engaging, and possible warning lights on the dashboard.
3. What causes the P1F0C code to appear?
Common causes include a faulty A/C compressor motor, damaged wiring or connectors in the feedback circuit, a failing Electric A/C Compressor Control Module, or low system voltage.
4. Can I drive my Buick with the P1F0C code active?
While the vehicle may still be drivable, the A/C system may not function properly, and ignoring the issue could lead to further damage to the compressor or associated components.
5. How is the P1F0C code diagnosed?
A technician will use a scan tool to verify the code, inspect wiring and connections in the A/C compressor circuit, and test the A/C compressor motor and control module for faults.
6. What repairs can fix the P1F0C code?
Repairs may include replacing the A/C compressor motor, repairing or replacing damaged wiring or connectors, or replacing the Electric A/C Compressor Control Module if it's defective.
7. Is the P1F0C code specific to Buicks?
While the code can appear on other vehicles with similar systems, it is commonly associated with Buick models equipped with electric A/C compressors.
8. Can a weak car battery cause the P1F0C code?
Yes, a weak or failing car battery can cause low voltage issues, which may trigger the P1F0C code.
9. How much does it cost to repair the P1F0C code on a Buick?
Repair costs can vary widely, ranging from $150 for wiring repairs to over $1,500 for an A/C compressor replacement, depending on labor and part prices.
10. Will clearing the P1F0C code solve the problem?
Clearing the code without addressing the underlying issue will only temporarily remove the warning, and the code is likely to return once the fault is detected again.
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