AutoCodes – Mercury – P018D Mercury

P018D Mercury Code - Fuel Pressure Sensor 'B' Circuit High

Quick Answer

The Comprehensive Component Monitor (CCM) monitors the Fuel Lift Pump (FLP) circuit to the Powertrain Control Module for low voltage. Common causes include Faulty Fuel Pressure Sensor 'B', Fuel Pressure Sensor 'B' harness is open or shorted, Fuel Pressure Sensor 'B' 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: P018D Mercury indicates Fuel Pressure Sensor 'B' Circuit High.
Common causes: Common causes include Faulty Fuel Pressure Sensor 'B', Fuel Pressure Sensor 'B' harness is open or shorted, Fuel Pressure Sensor 'B' 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 1,098

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 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P018D Mercury Description

The Comprehensive Component Monitor (CCM) monitors the Fuel Lift Pump (FLP) circuit to the Powertrain Control Module for low voltage. The test fails if the voltage falls below a calibrated limit for a calibrated amount of time during testing.

OBDII Code P018D Mercury - Fuel Pressure Sensor 'B' Circuit High - AutoCodes.com — P018D Mercury Code - Fuel Pressure Sensor 'B' Circuit High

What does this mean?

What are the Possible Causes of the DTC P018D Mercury?

Faulty Fuel Pressure Sensor 'B'
Fuel Pressure Sensor 'B' harness is open or shorted
Fuel Pressure Sensor 'B' circuit poor electrical connection

How to Fix the DTC P018D Mercury?

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 P018D Mercury 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.

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Need more information on how to fix the P018D Mercury code? Get Access to Factory Service Manuals

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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 P018D Mercury Code

What does the OBDII code P018D indicate on a Mercury vehicle?

Code P018D indicates that the Engine Control Module (ECM) has detected a high voltage signal from the fuel pressure sensor 'B', suggesting a potential issue with the fuel pressure regulation or sensor itself.

What are common symptoms of code P018D in a Mercury?

Symptoms of code P018D may include a check engine light, poor engine performance, difficulty starting, engine stalling, and possibly increased fuel consumption.

What could cause code P018D to appear on my Mercury?

Potential causes for code P018D include a faulty fuel pressure sensor, wiring issues such as shorts or open circuits in the sensor wiring, or problems with the fuel pressure regulator.

How can I diagnose and fix code P018D in my Mercury?

To diagnose code P018D, a technician will typically use a scan tool to confirm the code, check the wiring and connectors for damage, and test the fuel pressure sensor and fuel pressure to ensure they are functioning correctly. Replacing the faulty sensor or repairing any wiring issues usually resolves the problem.

Can driving with code P018D cause damage to my Mercury?

Yes, driving with code P018D can lead to poor engine performance and potentially more serious issues like engine stalling or failure to start. It is advised to address the issue as soon as possible to avoid further damage.

Is it safe to drive my Mercury with the check engine light on and code P018D present?

While the vehicle may still be drivable, it is not recommended to continue driving without addressing code P018D, as it can lead to reduced performance and potential engine damage. It's best to diagnose and repair the issue promptly.

What tools are needed to diagnose code P018D on a Mercury?

Diagnosing code P018D typically requires a digital multimeter, a fuel pressure gauge, and a professional OBDII scanner capable of reading factory-specific codes and live data to effectively pinpoint the issue.

How often does code P018D occur in Mercury vehicles?

Code P018D isn't the most common OBDII code, but it can occur if there are issues related to the fuel pressure system, particularly as vehicles age or if they have not been maintained properly regarding fuel system care.