AutoCodes – GMC – P148F 2020 GMC Sierra

P148F 2020 GMC Sierra Code - EVAP Purge Pump Voltage Sensor High 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
P148F 2020 GMC Sierra indicates EVAP Purge Pump Voltage Sensor High 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.
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Code Popularity 255
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 18, 2023
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Code P148F 2020 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 greater than 28.0 V for greater than 1 s.
OBDII Code P148F 2020 GMC Sierra - EVAP Purge Pump Voltage Sensor High Voltage - AutoCodes.com
P148F 2020 GMC Sierra Code - EVAP Purge Pump Voltage Sensor High Voltage

What are the Possible Causes of the DTC P148F 2020 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 P148F 2020 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 P148F 2020 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 P148F 2020 GMC Sierra code?

Need more information on how to fix the P148F 2020 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P148F 2020 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 P148F 2020 GMC Sierra Code

1. What are the common symptoms of OBDII code P148F in a 2020 GMC Sierra?

- Common symptoms include the check engine light being illuminated, decreased fuel efficiency, and potential issues with the vehicle's emission system.

2. What does the OBDII code P148F on a 2020 GMC Sierra indicate?

- This code specifically points to a high voltage condition detected in the EVAP purge pump voltage sensor.

3. What are the possible causes of OBDII code P148F in a 2020 GMC Sierra?

- Potential causes include a faulty EVAP purge pump, damaged wiring or connectors in the EVAP system, or a malfunctioning voltage sensor.

4. How serious is the EVAP Purge Pump Voltage Sensor High Voltage code P148F in a 2020 GMC Sierra?

- While the vehicle may still be operational, it is important to address this issue promptly to prevent potential damage to the emission system and ensure optimal performance.

5. Can I continue driving my 2020 GMC Sierra with OBDII code P148F present?

- It is generally not recommended to ignore this code and continue driving, as it can lead to increased emissions and potential long-term issues with the vehicle.

6. How can I diagnose OBDII code P148F in my 2020 GMC Sierra?

- Diagnosing this code typically involves using an OBDII scanner to read the code, inspecting the EVAP system components, checking for wiring issues, and testing the voltage sensor.

7. Is it possible to reset the check engine light after fixing OBDII code P148F in a 2020 GMC Sierra?

- Yes, once the underlying issue causing the code has been fixed, the check engine light can be reset using an OBDII scanner to clear the code.

8. What are some repair tips for addressing OBDII code P148F in a 2020 GMC Sierra?

- Repair tips include checking and replacing the EVAP purge pump if necessary, inspecting and repairing any damaged wiring or connectors, and testing the voltage sensor to ensure proper operation.

9. Can a DIY enthusiast fix OBDII code P148F in a 2020 GMC Sierra?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code by following repair guides and using proper diagnostic equipment.

10. How much does it typically cost to repair OBDII code P148F in a 2020 GMC Sierra at a professional mechanic?

- The cost of repairing this code can vary based on the specific underlying issue, but it may range from $100 to $500 or more, including parts and labor.

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