P19FA Cadillac 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 Cadillac 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.
Code P19FA Cadillac 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 frequency is greater than 355 Hz.
What are the Possible Causes of the DTC P19FA 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 P19FA 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 P19FA 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.
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Frequently Asked Questions about P19FA Cadillac Code
1. What are the common symptoms of OBDII code P19FA in a Cadillac Hybrid/EV related to the Coolant Pump Feedback Circuit High Frequency?
The common symptoms include the Check Engine Light illuminating on the dashboard, reduced engine performance, and potential overheating issues.
2. What could cause the OBDII code P19FA in a Cadillac Hybrid/EV?
The code P19FA is typically triggered by a malfunction in the coolant pump feedback circuit, which may be caused by a faulty coolant pump, damaged wiring or connectors, or an issue with the coolant pump control module.
3. How can I diagnose the OBDII code P19FA in my Cadillac Hybrid/EV?
Diagnosing the code P19FA usually involves using a diagnostic scanner to retrieve the specific fault code, inspecting the coolant pump and its components for any visible damage, and testing the wiring and connectors for continuity.
4. Is it safe to continue driving my Cadillac Hybrid/EV with the OBDII code P19FA present?
It is not recommended to continue driving your Cadillac with the code P19FA active, as it may lead to further damage to the coolant system and potentially cause overheating issues, which can result in more severe engine damage.
5. How can I repair the OBDII code P19FA in my Cadillac Hybrid/EV?
Repairing the code P19FA may involve replacing the faulty coolant pump, repairing or replacing damaged wiring or connectors, or reprogramming the coolant pump control module. It is recommended to consult a professional mechanic for an accurate diagnosis and repair.
6. Can I reset the OBDII code P19FA in my Cadillac Hybrid/EV on my own?
You can try resetting the code using a diagnostic scanner, but it is important to address the underlying issue causing the code to prevent it from recurring. If the problem is not fixed, the code is likely to reappear after driving the vehicle for some time.
7. How much does it typically cost to repair the OBDII code P19FA in a Cadillac Hybrid/EV?
The cost of repairing the code P19FA can vary depending on the underlying issue, the extent of the damage, and labor costs. On average, the repair may range from $200 to $800, including parts and labor.
8. Are there any preventive maintenance tips to avoid the OBDII code P19FA in my Cadillac Hybrid/EV?
To prevent the code P19FA, it is essential to follow the manufacturer's recommended maintenance schedule, regularly inspect the coolant system for leaks or damage, and address any cooling system issues promptly to avoid further damage.
9. Can a DIY enthusiast with basic automotive knowledge repair the OBDII code P19FA in a Cadillac Hybrid/EV?
While some aspects of diagnosing and repairing the code P19FA may be within reach of a DIY enthusiast, it is recommended to consult a professional mechanic for an accurate diagnosis and repair to ensure the issue is resolved correctly and prevent further damage.
10. Is the OBDII code P19FA specific to Cadillac Hybrid/EVs, or can it occur in other vehicles as well?
The OBDII code P19FA related to the Coolant Pump Feedback Circuit High Frequency is specific to Cadillac Hybrid/EVs, as it is a manufacturer-specific code that may not apply to other vehicle brands or models.
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