P1F0B Cadillac 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 Cadillac 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.
Code P1F0B Cadillac 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 P1F0B 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 P1F0B 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 P1F0B 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.
Need more information about the P1F0B Cadillac code?
Need more information on how to fix the P1F0B Cadillac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1F0B Cadillac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1F0B Cadillac Code
1. What does the OBDII code P1F0B mean on a Cadillac?
The P1F0B code indicates an issue with the A/C compressor motor's start-up current performance, often related to electrical or mechanical faults in the A/C system.
2. What are the common symptoms of the P1F0B code in a Cadillac?
Symptoms include reduced or no A/C cooling, unusual noises from the compressor, or the A/C system failing to engage.
3. What causes the P1F0B code on a Cadillac?
Common causes include a faulty A/C compressor motor, electrical issues like poor wiring or connections, or a malfunctioning compressor control module.
4. Can I drive my Cadillac with the P1F0B code active?
While the vehicle is generally safe to drive, the A/C system may not function properly, impacting cabin comfort, especially in hot weather.
5. How is the P1F0B code diagnosed?
A technician will use a scan tool to confirm the code, inspect wiring and connections, test the A/C compressor motor, and check for related faults.
6. How do you fix the P1F0B code on a Cadillac?
Repairs may include replacing the A/C compressor motor, repairing damaged wiring, or reprogramming or replacing the compressor control module.
7. Can a low refrigerant level cause the P1F0B code?
Low refrigerant typically does not cause this code, but it can lead to other A/C issues that may indirectly affect system performance.
8. What tools are needed to diagnose and repair the P1F0B code?
A professional-grade OBDII scanner, multimeter, and specialized tools for testing and replacing A/C system components are typically required.
9. How much does it cost to fix the P1F0B code on a Cadillac?
Repair costs vary but can range from $200 to $1,500, depending on whether the issue is with wiring, the compressor motor, or the control module.
10. Can a software update resolve the P1F0B code on a Cadillac?
In some cases, a software update for the A/C control module may resolve the issue if it's caused by programming errors.
Discuss the causes and fixes for P1F0B Cadillac OBDII Code
Code P1F0B Cadillac comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
