AutoCodes – Generic – P2542

P2542 Code - Low Pressure Fuel System Sensor Circuit High

Quick Answer

The Engine Control Module (ECM) monitors the Low Pressure Fuel System Sensor Circuit signal. Common causes include Low fuel level, Faulty Low Pressure Fuel System Sensor, Low Pressure Fuel System Sensor harness is open or shorted. 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: P2542 indicates Low Pressure Fuel System Sensor Circuit High.
Common causes: Common causes include Low fuel level, Faulty Low Pressure Fuel System Sensor, Low Pressure Fuel System Sensor harness is open or shorted.
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 16,161

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 Jan 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2542 Description

The Engine Control Module (ECM) monitors the Low Pressure Fuel System Sensor Circuit signal. The ECM sets the OBDII code when the Low Pressure Fuel System Sensor signal is out of factory specifications.

OBDII Code P2542 - Low Pressure Fuel System Sensor Circuit High - AutoCodes.com — P2542 Code - Low Pressure Fuel System Sensor Circuit High

What does this mean?

What are the Possible Causes of the DTC P2542?

Low fuel level
Faulty Low Pressure Fuel System Sensor
Low Pressure Fuel System Sensor harness is open or shorted
Low Pressure Fuel System Sensor circuit poor electrical connection

How to Fix the DTC P2542?

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 P2542 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 P2542 code?

Need more information on how to fix the P2542 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2542 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2542 Acura — Low Pressure Fuel System Sensor Circuit High
P2542 Audi — Low Pressure Fuel System Sensor Circuit High
P2542 Dodge — Low Pressure Fuel System Sensor Circuit High
P2542 Honda — Low Pressure Fuel System Sensor Circuit High
P2542 Volkswagen — Low Pressure Fuel System Sensor Circuit High

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.