P19FC Code - Hybrid/EV Electronics Coolant Pump Feedback Circuit Performance
Quick Answer
The Hybrid/EV Electronics Coolant Pump is a single-speed ON/OFF pump that circulates coolant through the auxiliary coolant radiator, starter/generator control module, and the starter/generator to control the temperature of these components. Common causes include Faulty Starter/Generator Coolant Pump Relay, Faulty Starter/Generator Coolant Pump, Starter/Generator Coolant Pump harness is open or shorted. 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
- P19FC indicates Hybrid/EV Electronics Coolant Pump Feedback Circuit Performance.
- Common causes
- Common causes include Faulty Starter/Generator Coolant Pump Relay, Faulty Starter/Generator Coolant Pump, Starter/Generator Coolant Pump harness is open or shorted.
- 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 P19FC Description
The Enable and Feedback circuits allow the drive motor control module to control and monitor the Hybrid/EV Electronics Coolant Pump.
The Enable circuit controls the starter/generator coolant pump relay by applying ground to the relay coil control circuit. With the coil grounded, the relay switch is closed, and voltage is sent to the coolant pump, which begins circulating coolant.
The Hybrid/EV Electronics Coolant Pump utilizes a pulse-width modulated signal on the Feedback circuit to the drive motor control module. During normal operation, the feedback circuit provides pump speed information to the control module. If the Hybrid/EV Electronics Coolant Pump determines there is an internal fault it provides this information on the same feedback circuit instead of pump speed information. The starter/generator control module contains the Hybrid/EV Powertrain Control Module 1, drive motor control module, and the 14 V power module.
The Hybrid/EV Powertrain Control Module 1 will determine when a fault condition is present. Diagnostics and system status are communicated from the drive motor control module to the Hybrid/EV Powertrain Control Module 1 through internal serial data. The Hybrid/EV Powertrain Control Module 1 is the host controller for diagnostic trouble code information.
The Diagnostic Trouble Code (DTC) will be set if the Hybrid/EV Powertrain Control Module 1 detects the Coolant Pump Feedback circuit indicated pump speed is greater than 225 RPM when the pump is not enabled.
What are the Possible Causes of the DTC P19FC?
- Faulty Starter/Generator Coolant Pump Relay
- Faulty Starter/Generator Coolant Pump
- Starter/Generator Coolant Pump harness is open or shorted
- Starter/Generator Coolant Pump circuit poor electrical connection
- Faulty Starter/Generator Control Module
How to Fix the DTC P19FC?
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 P19FC 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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Information for Specific Makes
- P19FC Buick — Hybrid/EV Electronics Coolant Pump Feedback Circuit Performance
- P19FC Cadillac — Hybrid/EV Electronics Coolant Pump Feedback Circuit Performance
- P19FC Chevrolet — Hybrid/EV Electronics Coolant Pump Feedback Circuit Performance
- P19FC GMC — Hybrid/EV Electronics Coolant Pump Feedback Circuit Performance
Frequently Asked Questions about P19FC Code
1. What are the common symptoms of OBDII code P19FC?
- Common symptoms include poor hybrid system performance, overheating issues, and illuminated warning lights on the dashboard.
2. What does the OBDII code P19FC indicate?
- The code P19FC indicates a malfunction in the Hybrid/EV Electronics Coolant Pump Feedback Circuit Performance.
3. What are some possible causes of code P19FC?
- Possible causes include a faulty coolant pump, issues with the coolant pump control module, damaged wiring, or poor electrical connections.
4. How can I diagnose the cause of OBDII code P19FC?
- Diagnosis involves checking the coolant pump operation, inspecting the wiring and connections, and testing the coolant pump control module for proper functioning.
5. Can I still drive my vehicle with OBDII code P19FC?
- It is not recommended to drive the vehicle with code P19FC as it can lead to further damage to the hybrid system components.
6. How can I repair OBDII code P19FC?
- Repair may involve replacing the faulty coolant pump, repairing damaged wiring, or addressing issues with the coolant pump control module.
7. Are there any DIY tips for addressing code P19FC?
- DIY tips include checking the coolant pump fuse, ensuring proper coolant levels, and inspecting for any visible damage to the coolant pump components.
8. Is it necessary to reset the OBDII code P19FC after repairs?
- Yes, it is important to reset the code using an OBDII scanner after repairs to clear the fault memory and ensure proper functioning of the system.
9. Can a malfunctioning coolant pump cause other issues in a hybrid vehicle?
- Yes, a malfunctioning coolant pump can lead to overheating of the hybrid system components, reduced efficiency, and potential damage to other electronic components.
10. How can I prevent OBDII code P19FC from recurring?
- Regular maintenance, including coolant system inspections, checking electrical connections, and addressing any warning signs promptly, can help prevent the recurrence of code P19FC.
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