AutoCodes – Cadillac – P19FC Cadillac

P19FC Cadillac 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 Cadillac 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.

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Code Popularity 350

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 Jul 26, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P19FC Cadillac Description

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.
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.

OBDII Code P19FC Cadillac - Hybrid/EV Electronics Coolant Pump Feedback Circuit Performance - AutoCodes.com — P19FC Cadillac Code - Hybrid/EV Electronics Coolant Pump Feedback Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P19FC Cadillac?

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 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 P19FC 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 P19FC Cadillac code?

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Need Help with the Code?

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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 P19FC Cadillac Code

1. What are common symptoms of OBDII code P19FC in a Cadillac Hybrid/EV related to the coolant pump feedback circuit performance?

The common symptoms include overheating of the vehicle, poor engine performance, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P19FC in a Cadillac Hybrid/EV?

The code P19FC can be triggered by issues such as a malfunctioning coolant pump, damaged wiring or connectors in the feedback circuit, or a faulty coolant temperature sensor.

3. How can I diagnose the OBDII code P19FC in a Cadillac Hybrid/EV?

Diagnosing the code P19FC involves using an OBDII scanner to read the trouble codes, inspecting the coolant pump and related components, checking the wiring and connectors for any damage, and testing the coolant temperature sensor.

4. Is it safe to continue driving my Cadillac Hybrid/EV with the OBDII code P19FC present?

It is not recommended to drive the vehicle with the code P19FC as it can lead to engine overheating and further damage. It is advised to address the issue promptly.

5. Can I repair the OBDII code P19FC in a Cadillac Hybrid/EV by myself?

While some DIY enthusiasts may be able to address simpler issues like checking and cleaning connectors, diagnosing and repairing the coolant pump or sensor may require professional intervention.

6. How much does it typically cost to repair OBDII code P19FC in a Cadillac Hybrid/EV?

The cost of repairing the code P19FC can vary depending on the specific issue causing it, the labor rates of the mechanic, and the cost of any replacement parts needed.

7. Are there any preventive maintenance tips to avoid triggering the OBDII code P19FC in a Cadillac Hybrid/EV?

Regularly inspecting the coolant system, ensuring proper coolant levels, and addressing any cooling system issues promptly can help prevent the occurrence of the code P19FC.

8. Can a faulty coolant pump cause other problems besides triggering the OBDII code P19FC in a Cadillac Hybrid/EV?

Yes, a faulty coolant pump can lead to engine overheating, reduced engine performance, and potential damage to the engine components if not addressed promptly.

9. How long does it typically take to repair the OBDII code P19FC in a Cadillac Hybrid/EV?

The repair time can vary depending on the specific issue causing the code P19FC, accessibility of components, and the expertise of the mechanic. It is advisable to consult with a professional for a more accurate estimate.

10. Is the OBDII code P19FC specific to Cadillac Hybrid/EV vehicles only?

The OBDII code P19FC related to the coolant pump feedback circuit performance is specific to Cadillac Hybrid/EV vehicles and may not be applicable to other vehicle makes and models.