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U111E 2019 Chevrolet Silverado Code - Lost Communication with EVAP Purge Pump

Quick Answer

The U111E diagnostic trouble code (DTC) for a 2019 Chevrolet Silverado indicates that there is a communication issue between the vehicle's engine control module (ECM) and the evaporative emission (EVAP) purge pump. Common causes include Faulty EVAP Purge Pump: A malfunctioning EVAP purge pump can prevent proper communication with the ECM, triggering the U111E code, Wiring or Connector Issues: Damaged or corroded wiring, or loose connectors between the ECM and the EVAP purge pump, can disrupt communication, Faulty ECM: A malfunctioning engine control module may be unable to establish communication with the EVAP purge pump. 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
U111E 2019 Chevrolet Silverado indicates Lost Communication with EVAP Purge Pump.
Common causes
Common causes include Faulty EVAP Purge Pump: A malfunctioning EVAP purge pump can prevent proper communication with the ECM, triggering the U111E code, Wiring or Connector Issues: Damaged or corroded wiring, or loose connectors between the ECM and the EVAP purge pump, can disrupt communication, Faulty ECM: A malfunctioning engine control module may be unable to establish communication with the EVAP purge pump.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code U111E 2019 Chevrolet Silverado Description

The U111E diagnostic trouble code (DTC) for a 2019 Chevrolet Silverado indicates that there is a communication issue between the vehicle's engine control module (ECM) and the evaporative emission (EVAP) purge pump. The EVAP system is responsible for capturing and storing fuel vapors to prevent them from escaping into the atmosphere. The purge pump is a crucial component of this system, as it helps to control the flow of fuel vapors from the charcoal canister to the engine for combustion.

OBDII Code U111E 2019 Chevrolet Silverado - Lost Communication with EVAP Purge Pump
U111E 2019 Chevrolet Silverado Code - Lost Communication with EVAP Purge Pump

Common Causes of U111E 2019 Chevrolet Silverado

  1. Faulty EVAP Purge Pump: A malfunctioning EVAP purge pump can prevent proper communication with the ECM, triggering the U111E code.
  2. Wiring or Connector Issues: Damaged or corroded wiring, or loose connectors between the ECM and the EVAP purge pump, can disrupt communication.
  3. Faulty ECM: A malfunctioning engine control module may be unable to establish communication with the EVAP purge pump.
  4. Software Glitch: An issue with the software programming of the ECM can also lead to a loss of communication with the EVAP purge pump.

Symptoms of U111E 2019 Chevrolet Silverado

  1. Check Engine Light: The most common symptom associated with the U111E code is the illumination of the check engine light on the vehicle's dashboard.
  2. Rough Idling: The vehicle may experience rough idling or fluctuations in engine speed due to the communication issue between the ECM and the EVAP purge pump.
  3. Poor Fuel Efficiency: A malfunctioning EVAP system can lead to decreased fuel efficiency, causing the vehicle to consume more fuel than usual.
  4. Stalling: In severe cases, the vehicle may stall or have difficulty starting, especially after refueling.

How to Fix U111E 2019 Chevrolet Silverado

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble codes and perform a thorough inspection of the EVAP system components, wiring, and connectors.
  2. Test EVAP Purge Pump: Test the EVAP purge pump to determine if it is functioning properly or needs replacement.
  3. Check Wiring and Connectors: Inspect the wiring harness and connectors for any damage or corrosion, repairing or replacing as necessary.
  4. Verify ECM Functionality: Ensure that the engine control module is operating correctly and able to communicate with the EVAP purge pump.
  5. Clear Codes and Test Drive: Clear the trouble codes from the ECM, reset the system, and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix U111E 2019 Chevrolet Silverado

The typical repair costs for addressing a U111E code related to a lost communication with the EVAP purge pump on a 2019 Chevrolet Silverado can range from $150 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing. For a precise estimate, it's recommended to consult with local auto repair professionals.

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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 U111E 2019 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code U111E in a 2019 Chevrolet Silverado related to lost communication with the EVAP purge pump?

- Common symptoms may include the check engine light illuminating, rough idling, poor fuel efficiency, and potential issues with the vehicle's emissions system.

2. What are the typical causes of OBDII code U111E in a 2019 Chevrolet Silverado indicating lost communication with the EVAP purge pump?

- The code U111E can be triggered by issues such as faulty wiring connections, a defective EVAP purge pump, a damaged control module, or communication network problems.

3. How can I diagnose OBDII code U111E in my 2019 Chevrolet Silverado with the EVAP purge pump communication problem?

- Diagnosis involves using an OBDII scanner to retrieve the code, checking the EVAP purge pump connections, inspecting wiring for damage, and testing the control module's functionality.

4. Are there any quick repair tips for addressing OBDII code U111E in a 2019 Chevrolet Silverado with a lost communication issue related to the EVAP purge pump?

- Quick repair tips include checking and repairing any damaged wiring, ensuring proper connections to the EVAP purge pump, and resetting the code to see if it reoccurs.

5. Can OBDII code U111E in a 2019 Chevrolet Silverado be fixed without professional help for lost communication with the EVAP purge pump?

- While some basic checks and repairs can be done by DIY enthusiasts, it's recommended to consult a qualified technician for a comprehensive diagnosis and repair to ensure the problem is properly resolved.

6. Is it safe to continue driving my 2019 Chevrolet Silverado with OBDII code U111E related to lost communication with the EVAP purge pump?

- It's advisable to address the issue promptly to prevent potential damage to the vehicle's emissions system and ensure optimal performance. Continued driving with unresolved codes can lead to further complications.

7. How much does it typically cost to repair OBDII code U111E in a 2019 Chevrolet Silverado due to lost communication with the EVAP purge pump?

- Repair costs can vary depending on the exact cause of the issue, but they may range from a simple wiring repair to a replacement of the EVAP purge pump or control module, potentially costing a few hundred dollars to fix.

8. Can a faulty EVAP purge pump cause OBDII code U111E in a 2019 Chevrolet Silverado even if the pump appears to be functioning?

- Yes, a faulty EVAP purge pump can still trigger the code if it's not communicating properly with the vehicle's control module, even if it seems to be operating. It's essential to check all connections and components for issues.

9. Will resetting the OBDII code U111E in my 2019 Chevrolet Silverado fix the communication problem with the EVAP purge pump?

- Simply resetting the code may temporarily clear the check engine light, but it won't address the underlying issue causing the lost communication. Proper diagnosis and repairs are necessary to prevent the code from reappearing.

10. How long does it typically take to repair OBDII code U111E in a 2019 Chevrolet Silverado associated with lost communication with the EVAP purge pump?

- The repair time can vary based on the exact cause of the problem and the extent of the repairs needed. Simple fixes like reconnecting wires may take a short time, while more complex issues could require several hours or more for diagnosis and repair.

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