U111E 2021 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 2021 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.
Code U111E 2021 Chevrolet Silverado Description
What are the Possible Causes of the DTC U111E 2021 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 2021 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 2021 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 2021 Chevrolet Silverado code?
Need more information on how to fix the U111E 2021 Chevrolet Silverado code? Get Access to Factory Service Manuals
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Frequently Asked Questions about U111E 2021 Chevrolet Silverado Code
1. What are common symptoms of OBDII code U111E on a 2021 Chevrolet Silverado related to the EVAP system?
- Common symptoms include check engine light illumination, rough idling, decreased fuel efficiency, and difficulty starting the vehicle.
2. What is the primary cause of the U111E code indicating lost communication with the EVAP purge pump on a 2021 Chevrolet Silverado?
- The primary cause is typically a faulty EVAP purge pump or issues with the wiring/connectors related to the purge pump.
3. How can I diagnose the U111E code on my 2021 Chevrolet Silverado if I suspect a problem with the EVAP purge pump?
- Diagnostic steps include checking the wiring, connectors, and vacuum lines associated with the EVAP purge pump, as well as testing the pump itself for proper functionality.
4. Are there any common repair tips for resolving the U111E code on a 2021 Chevrolet Silverado due to lost communication with the EVAP purge pump?
- Replace the EVAP purge pump if it is found to be faulty, ensure all connections are secure, and clear the trouble code with an OBDII scanner after making repairs.
5. Can a U111E code on a 2021 Chevrolet Silverado be triggered by issues other than a faulty EVAP purge pump?
- Yes, other possible causes include damaged wiring, loose connectors, or problems with the powertrain control module (PCM) communication network.
6. Is it safe to continue driving a 2021 Chevrolet Silverado with the U111E code related to the EVAP system?
- It is generally not recommended to drive the vehicle with this code present, as it can lead to potential issues with emissions control and overall engine performance.
7. How much does it typically cost to repair the U111E code indicating lost communication with the EVAP purge pump on a 2021 Chevrolet Silverado?
- Repair costs can vary depending on the exact cause of the issue, but expect to pay anywhere from $150 to $500 for parts and labor.
8. Can I reset the U111E trouble code on my 2021 Chevrolet Silverado without addressing the underlying issue with the EVAP system?
- While you can clear the code with an OBDII scanner, it is crucial to diagnose and fix the root cause to prevent the code from reappearing and ensure proper vehicle operation.
9. Will the U111E code on a 2021 Chevrolet Silverado cause the vehicle to fail an emissions test?
- Yes, the presence of this code typically indicates an issue with the emissions control system, which may lead to a failed emissions test.
10. How can I prevent the U111E code from recurring on my 2021 Chevrolet Silverado after repairing the EVAP purge pump communication issue?
- Regularly inspect and maintain the EVAP system components, ensure proper installation of any replacement parts, and address any related trouble codes promptly to prevent recurrence.
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