AutoCodes – Chevrolet – P19FA Chevrolet

P19FA Chevrolet Code - Hybrid/EV Electronics Coolant Pump Feedback Circuit High Frequency

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: P19FA Chevrolet indicates Hybrid/EV Electronics Coolant Pump Feedback Circuit High Frequency.
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 537

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 P19FA Chevrolet 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 frequency is greater than 355 Hz.

OBDII Code P19FA Chevrolet - Hybrid/EV Electronics Coolant Pump Feedback Circuit High Frequency - AutoCodes.com — P19FA Chevrolet Code - Hybrid/EV Electronics Coolant Pump Feedback Circuit High Frequency

What does this mean?

What are the Possible Causes of the DTC P19FA Chevrolet?

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 P19FA Chevrolet?

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 P19FA Chevrolet 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 P19FA Chevrolet Code

1. What are common symptoms of OBDII code P19FA in a Chevrolet Hybrid/EV?

- Common symptoms include the check engine light coming on, reduced performance, and potential overheating issues.

2. What does the OBDII code P19FA Chevrolet indicate?

- This code indicates a high frequency feedback circuit issue related to the coolant pump in the Hybrid/EV electronics system.

3. What are possible causes of the P19FA code in a Chevrolet Hybrid/EV?

- Possible causes include a faulty coolant pump, wiring issues, a malfunctioning control module, or a problem with the coolant pump feedback sensor.

4. How can I diagnose the P19FA code in my Chevrolet Hybrid/EV?

- Diagnosing this code usually involves using a scan tool to read the code, checking the coolant pump and its connections, and testing the feedback circuit for proper operation.

5. Can I still drive my Chevrolet with the P19FA code present?

- It is not recommended to drive your vehicle with the P19FA code present, as it can lead to further damage and potential overheating issues.

6. How can I repair the P19FA code in my Chevrolet Hybrid/EV?

- Repair typically involves replacing the faulty coolant pump, repairing any damaged wiring, or addressing issues with the control module or feedback sensor.

7. Is it necessary to take my Chevrolet to a dealership for P19FA code repairs?

- While a dealership may have specialized knowledge, any qualified mechanic should be able to diagnose and repair the P19FA code in your Chevrolet Hybrid/EV.

8. Are there any preventive maintenance tips to avoid the P19FA code in the future?

- Regularly inspecting the coolant pump, checking the wiring connections, and monitoring the cooling system can help prevent issues that may trigger the P19FA code.

9. Can the P19FA code be a recurring problem in a Chevrolet Hybrid/EV?

- If the underlying cause of the code is not properly addressed during repairs, it can potentially recur, emphasizing the importance of thorough diagnosis and repair.

10. How long does it typically take to repair the P19FA code in a Chevrolet Hybrid/EV?

- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from a few hours to a day for a skilled technician to diagnose and fix the problem.