AutoCodes – Mercury – U019F Mercury

U019F Mercury 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 Mercury 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 700

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

What does this mean?

What are the Possible Causes of the DTC U019F Mercury?

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 Mercury?

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 Mercury 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 U019F Mercury Code

What does the OBDII code U019F mean?

The OBDII code U019F indicates a "Lost Communication With Engine Coolant Pump Control Module," meaning the vehicle's computer cannot communicate with the coolant pump module, which is crucial for regulating engine temperature.

What are the common symptoms of the U019F code?

Common symptoms include engine overheating, dashboard warning lights, and issues with the vehicle's heating system, such as inadequate cabin heat.

What could cause the U019F code to trigger?

Causes may include faulty wiring or connectors, a malfunctioning engine coolant pump control module, or issues with the vehicle's main computer (ECM).

How can I diagnose the U019F code?

To diagnose the U019F code, use an OBDII scanner to confirm the code and check for any related trouble codes. Inspect wiring and connections between the engine control module and the coolant pump control module.

What are some repair tips for fixing the U019F code?

Repair tips include checking and repairing any damaged wiring or connectors, testing the engine coolant pump control module, and clearing the code to see if it returns after repairs.

Can driving with the U019F code cause damage to my vehicle?

Yes, driving with this code can potentially lead to engine overheating, which may cause serious damage if not addressed promptly.

Is it safe to drive with the U019F code?

It is generally not safe to drive with this code, as it may lead to overheating and other related issues. It is recommended to address the problem as soon as possible.

How much does it typically cost to fix the U019F code?

Repair costs can vary widely depending on the root cause but may range from $100 for wiring repairs to several hundred dollars for replacing the engine coolant pump control module.

Can I fix the U019F code myself?

If you have experience with automotive repairs, you may be able to diagnose and fix wiring issues or replace the coolant pump control module. However, if you are unsure, itâ€™s best to consult a professional mechanic.