AutoCodes – Generic – P148F

P148F 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 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 2,594

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 P148F 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 - EVAP Purge Pump Voltage Sensor High Voltage - AutoCodes.com — P148F Code - EVAP Purge Pump Voltage Sensor High Voltage

What does this mean?

What are the Possible Causes of the DTC P148F?

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?

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 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 code?

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

Need Help with the Code?

Get the P148F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P148F Buick — EVAP Purge Pump Voltage Sensor High Voltage
P148F Cadillac — EVAP Purge Pump Voltage Sensor High Voltage
P148F Chevrolet — EVAP Purge Pump Voltage Sensor High Voltage
P148F GMC — EVAP Purge Pump Voltage Sensor High Voltage

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 Code

1. What are the common symptoms of OBDII code P148F (EVAP Purge Pump Voltage Sensor High Voltage)?

The common symptoms include the Check Engine Light coming on, decreased fuel efficiency, and potential rough idling or stalling.

2. What can cause the OBDII code P148F to trigger?

The code P148F is typically triggered by a fault in the EVAP purge pump voltage sensor circuit, indicating a high voltage reading.

3. How serious is the OBDII code P148F (EVAP Purge Pump Voltage Sensor High Voltage)?

While the vehicle may still be driveable with this code, it is important to address the underlying issue promptly to prevent potential damage to the EVAP system and ensure optimal vehicle performance.

4. Can a faulty gas cap cause the OBDII code P148F to appear?

While a faulty gas cap can sometimes trigger EVAP-related codes, code P148F specifically relates to issues with the EVAP purge pump voltage sensor and its circuit.

5. What are some DIY repair tips for addressing code P148F?

DIY repair tips may include checking and cleaning the electrical connections related to the EVAP purge pump voltage sensor, inspecting for any damaged wiring, and ensuring proper sensor function.

6. Is it safe to continue driving with the OBDII code P148F present?

It is generally safe to drive with this code present in the short term, but it is recommended to address the underlying issue as soon as possible to prevent potential complications.

7. Can a simple reset of the Check Engine Light resolve code P148F?

While clearing the code may temporarily turn off the Check Engine Light, it will not address the underlying issue causing code P148F to trigger.

8. How can a mechanic diagnose the OBDII code P148F accurately?

A mechanic can use a scan tool to retrieve the code, perform a thorough inspection of the EVAP system, test the voltage sensor, and check the associated wiring for any faults.

9. Are there any recalls related to OBDII code P148F?

Recalls related to this specific code can vary by vehicle make and model, so it is recommended to check with the manufacturer or authorized dealerships for any relevant information.

10. What is the typical repair cost for addressing OBDII code P148F?

The repair cost for OBDII code P148F can vary depending on the specific cause of the issue, but it may involve replacing the EVAP purge pump voltage sensor, repairing wiring, or addressing other related components.