AutoCodes – GMC – P148E 2021 GMC Sierra

P148E 2021 GMC Sierra Code - EVAP Purge Pump Voltage Sensor Low Voltage

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: P148E 2021 GMC Sierra indicates EVAP Purge Pump Voltage Sensor Low Voltage.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 315

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P148E 2021 GMC Sierra 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, and the Diagnostic Trouble Code (DTC) will be set when the EVAP Purge Pump Voltage is less than 3.5 V for greater than 1 s.

OBDII Code P148E 2021 GMC Sierra - EVAP Purge Pump Voltage Sensor Low Voltage - AutoCodes.com — P148E 2021 GMC Sierra Code - EVAP Purge Pump Voltage Sensor Low Voltage

What does this mean?

What are the Possible Causes of the DTC P148E 2021 GMC Sierra?

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 P148E 2021 GMC Sierra?

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 P148E 2021 GMC Sierra 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 P148E 2021 GMC Sierra code?

Need more information on how to fix the P148E 2021 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P148E 2021 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P148E 2021 GMC Sierra Code

1. What are common symptoms of OBDII code P148E in a 2021 GMC Sierra?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What does the OBDII code P148E indicate in a 2021 GMC Sierra?

- The code P148E indicates a low voltage condition in the EVAP purge pump voltage sensor of the vehicle.

3. What are possible causes of the EVAP Purge Pump Voltage Sensor low voltage issue in a 2021 GMC Sierra?

- Possible causes include a faulty EVAP purge pump, damaged wiring or connectors, a defective purge pump voltage sensor, or a problem with the vehicle's EVAP system.

4. How can I diagnose the cause of OBDII code P148E in my 2021 GMC Sierra?

- To diagnose the issue, you can use an OBDII scanner to retrieve the trouble codes, inspect the EVAP system components for damage, check the wiring and connectors for any faults, and test the purge pump voltage sensor.

5. Can I continue driving my 2021 GMC Sierra with the P148E code present?

- It is not recommended to continue driving with the P148E code illuminated, as it can lead to further damage to the vehicle's emissions system and affect overall performance.

6. How can I repair the EVAP Purge Pump Voltage Sensor low voltage issue in my 2021 GMC Sierra?

- Repairing the issue may involve replacing the faulty EVAP purge pump, repairing or replacing damaged wiring or connectors, replacing the purge pump voltage sensor, or addressing any other underlying issues in the EVAP system.

7. Will resetting the Check Engine Light resolve the P148E code in my 2021 GMC Sierra?

- Resetting the Check Engine Light may temporarily clear the code, but it will not fix the underlying issue causing the low voltage in the EVAP purge pump voltage sensor.

8. Is the EVAP Purge Pump Voltage Sensor low voltage issue covered under warranty for a 2021 GMC Sierra?

- Depending on your vehicle's warranty coverage, the repair for the P148E code may be covered under the manufacturer's warranty. It is recommended to check with your dealership for more information.

9. Can a DIY enthusiast repair the EVAP Purge Pump Voltage Sensor low voltage issue in a 2021 GMC Sierra?

- While some DIY enthusiasts may be able to diagnose and repair the issue themselves, it is recommended to have a professional mechanic or technician address the problem to ensure proper diagnosis and repair.

10. How often does the EVAP Purge Pump Voltage Sensor low voltage issue occur in 2021 GMC Sierra vehicles?

- The frequency of this issue can vary, but it is not uncommon in vehicles with high mileage or older components. Regular maintenance and inspections can help prevent and address such problems.