AutoCodes – Chevrolet – U111E 2020 Chevrolet Silverado

U111E 2020 Chevrolet Silverado Code - Lost Communication with EVAP Purge Pump

Quick Answer

Purge capacity is being reduced by technologies that improve fuel economy. Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge Pump 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: U111E 2020 Chevrolet Silverado indicates Lost Communication with EVAP Purge Pump.
Common causes: Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge Pump 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 464

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 18, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U111E 2020 Chevrolet Silverado Description

Purge capacity is being reduced by technologies that improve fuel economy. The Evaporative Emission Purge Pump is used to purge stored vapors from the Evaporative Emission Canister and is required to increase the purge volumes to meet LEV 3 Evaporative Emission requirements. The Evaporative Emission Purge Pump has an integral pressure sensor for controlling purge vapors from the canister. The Engine Control Module (ECM) monitors the Evaporative Emission Purge Pump, the Diagnostic Trouble Code (DTC) will be set when the serial data message from Evaporative Emission Purge Pump is not received for greater than 1 s.

OBDII Code U111E 2020 Chevrolet Silverado - Lost Communication with EVAP Purge Pump - AutoCodes.com — U111E 2020 Chevrolet Silverado Code - Lost Communication with EVAP Purge Pump

What does this mean?

What are the Possible Causes of the DTC U111E 2020 Chevrolet Silverado?

Faulty Evaporative Emission Purge Pump
Evaporative Emission Purge Pump harness is open or shorted
Evaporative Emission Purge Pump circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC U111E 2020 Chevrolet Silverado?

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 U111E 2020 Chevrolet Silverado 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 U111E 2020 Chevrolet Silverado code?

Need more information on how to fix the U111E 2020 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2020 Chevrolet Silverado Code

1. What does the OBDII code U111E mean for a 2020 Chevrolet Silverado?

The code U111E on a 2020 Chevrolet Silverado indicates a "Lost Communication with EVAP Purge Pump" error.

2. What are common symptoms of a U111E code on a 2020 Chevrolet Silverado?

Common symptoms of a U111E code may include the check engine light illuminating, rough idling, decreased fuel efficiency, and difficulty starting the vehicle.

3. What are possible causes of a U111E code on a 2020 Chevrolet Silverado?

Possible causes of a U111E code include faulty EVAP purge pump, damaged wiring or connectors in the EVAP system, or a malfunctioning powertrain control module (PCM).

4. How can I diagnose a U111E code on a 2020 Chevrolet Silverado?

Diagnosing a U111E code typically involves using an OBDII scanner to retrieve the specific code, checking the EVAP purge pump and related components for any visible damage, and inspecting the wiring and connectors for any issues.

5. Can I still drive my 2020 Chevrolet Silverado with a U111E code?

It is not recommended to drive your 2020 Chevrolet Silverado with a U111E code, as it can lead to further damage and potential safety hazards. It is best to address the issue promptly.

6. How much does it cost to repair a U111E code on a 2020 Chevrolet Silverado?

The cost of repairing a U111E code on a 2020 Chevrolet Silverado can vary depending on the specific cause of the issue, but it typically ranges from $100 to $500 for parts and labor.

7. Can I fix a U111E code on a 2020 Chevrolet Silverado myself?

If you have the necessary tools and knowledge, you may be able to fix a U111E code yourself by replacing the faulty EVAP purge pump or repairing damaged wiring. However, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. How long does it take to repair a U111E code on a 2020 Chevrolet Silverado?

The time it takes to repair a U111E code on a 2020 Chevrolet Silverado can vary depending on the extent of the issue and the availability of parts. In general, the repair can be completed within a few hours to a day.

9. Will a U111E code reset itself on a 2020 Chevrolet Silverado?

A U111E code may reset itself if the underlying issue is temporary or intermittent. However, it is recommended to diagnose and address the root cause to prevent the code from reoccurring.

10. Is it safe to continue driving my 2020 Chevrolet Silverado if the U111E code disappears?

Even if the U111E code disappears, it is still important to address the underlying issue to ensure the proper functioning of the EVAP system and prevent potential problems in the future.