AutoCodes – Generic – U019F

U019F Code - Lost Communication With Engine Coolant Pump Control Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Engine Coolant Pump Control Module, Engine Coolant Pump Control Module harness is open or shorted, Engine Coolant Pump Control Module 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: U019F indicates Lost Communication With Engine Coolant Pump Control Module.
Common causes: Common causes include Faulty Engine Coolant Pump Control Module, Engine Coolant Pump Control Module harness is open or shorted, Engine Coolant Pump Control Module 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.

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Code Popularity 16,881

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 Apr 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U019F Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Engine Coolant Pump Control Module has not been received.

OBDII Code U019F - Lost Communication With Engine Coolant Pump Control Module - AutoCodes.com — U019F Code - Lost Communication With Engine Coolant Pump Control Module

What does this mean?

What are the Possible Causes of the DTC U019F?

Faulty Engine Coolant Pump Control Module
Engine Coolant Pump Control Module harness is open or shorted
Engine Coolant Pump Control Module circuit poor electrical connection

How to Fix the DTC U019F?

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 U019F 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 U019F code?

Need more information on how to fix the U019F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U019F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U019F Ford — Lost Communication With Engine Coolant Pump Control Module
U019F Lincoln — Lost Communication With Engine Coolant Pump Control Module
U019F Mercury — Lost Communication With Engine Coolant Pump Control Module

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 U019F Code

1. What are the common symptoms of OBDII code U019F?

- Common symptoms may include the engine overheating, coolant pump not functioning properly, and warning lights illuminated on the dashboard.

2. What can cause the OBDII code U019F to trigger?

- The code can be triggered by issues such as a faulty engine coolant pump control module, damaged wiring or connectors, or a communication breakdown between the module and the vehicle's computer system.

3. How can I diagnose the cause of the U019F code?

- A thorough diagnostic scan using an OBDII scanner can help pinpoint the exact cause of the code. Checking the wiring, connectors, and the coolant pump control module itself for any visible damage is also recommended.

4. What are some possible repair tips for resolving the U019F code?

- Repair tips may include repairing or replacing damaged wiring and connectors, testing and potentially replacing the engine coolant pump control module, and ensuring all connections are secure and free of corrosion.

5. Can I continue driving with the U019F code present?

- It is not recommended to continue driving with the U019F code present, as it can lead to engine overheating and potential damage. It is best to address the issue promptly to prevent further complications.

6. How serious is the U019F code?

- The U019F code is considered serious as it indicates a loss of communication with the engine coolant pump control module, which can impact the proper functioning of the cooling system and potentially lead to engine damage if not addressed.

7. Is it possible to reset the U019F code without fixing the underlying issue?

- While it is possible to clear the code using an OBDII scanner, it is not recommended to do so without addressing the underlying issue causing the code. Resetting the code without fixing the problem will likely result in it reoccurring.

8. Are there any common mistakes to avoid when dealing with the U019F code?

- Common mistakes to avoid include neglecting to check the wiring and connectors for damage, assuming the coolant pump is the only issue, and failing to address the communication breakdown between the control module and the vehicle's computer system.

9. How much does it typically cost to repair the U019F code?

- The cost of repairing the U019F code can vary depending on the underlying issue and whether any parts need to be replaced. Costs may include labor fees, replacement parts, and diagnostic testing.

10. Can I prevent the U019F code from occurring in the future?

- Regular maintenance, such as checking the coolant pump control module, inspecting wiring and connectors for damage, and addressing any warning signs promptly, can help prevent the U019F code from occurring in the future.