AutoCodes – Mercury – P008B Mercury

P008B Mercury Code - Low Pressure Fuel System Pressure Too High

Quick Answer

The Fuel Rail Pressure (FRP) Sensor is a diaphragm strain gauge device. Common causes include High fuel pressure, Faulty Fuel Rail Pressure (FRP) Sensor, Fuel Rail Pressure 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
P008B Mercury indicates Low Pressure Fuel System Pressure Too High.
Common causes
Common causes include High fuel pressure, Faulty Fuel Rail Pressure (FRP) Sensor, Fuel Rail Pressure 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,570
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 11, 2023
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Code P008B Mercury Description

The Fuel Rail Pressure (FRP) Sensor is a diaphragm strain gauge device. The FRP sensor measures the pressure difference between the fuel rail and atmospheric pressure. The FRP sensor is located on the fuel rail and provides a feedback signal to indicate the fuel rail pressure to the Powertrain Control Module (PCM). The PCM uses the FRP signal to command the correct injector timing and pulse width for correct fuel delivery at all speeds and load conditions. The PCM regulates the fuel rail pressure by controlling the fuel volume regulator. This Diagnostic Trouble Code (DTC) is set when the low pressure fuel system pressure rises above an expected threshold.
OBDII Code P008B Mercury - Low Pressure Fuel System Pressure Too High - AutoCodes.com
P008B Mercury Code - Low Pressure Fuel System Pressure Too High

What are the Possible Causes of the DTC P008B Mercury?

  • High fuel pressure
  • Faulty Fuel Rail Pressure (FRP) Sensor
  • Fuel Rail Pressure Sensor harness is open or shorted
  • Fuel Rail Pressure Sensor circuit poor electrical connection

How to Fix the DTC P008B 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 P008B 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.

Need more information about the P008B Mercury code?

Need more information on how to fix the P008B Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P008B Mercury 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 P008B Mercury Code

1. What are the common symptoms of OBDII code P008B in a Mercury vehicle?

- Common symptoms include rough idling, engine misfires, loss of power, and the Check Engine light illuminating.

2. What can cause the OBDII code P008B to be triggered in a Mercury?

- The code is typically triggered when the low-pressure fuel system pressure becomes too high, often due to a faulty fuel pump, fuel pressure sensor, or fuel pressure regulator.

3. How can I diagnose the issue causing the OBDII code P008B in my Mercury?

- A diagnostic scan tool can help pinpoint the specific cause by reading live data, checking fuel pressure readings, and conducting a thorough inspection of the fuel system components.

4. Will driving my Mercury with the OBDII code P008B cause further damage?

- Continuing to drive with this code may lead to poor engine performance, reduced fuel efficiency, and potential damage to other engine components over time.

5. What are some repair tips for fixing the low-pressure fuel system pressure issue in a Mercury?

- Repair options may include replacing the fuel pump, fuel pressure sensor, fuel pressure regulator, or addressing any fuel line blockages or leaks contributing to the high pressure.

6. Can a DIY enthusiast fix the OBDII code P008B issue in a Mercury, or is professional help recommended?

- While some experienced DIYers may tackle this repair, it is often recommended to seek professional help due to the intricacies of the fuel system and potential safety hazards.

7. Are there any preventative measures to avoid the recurrence of OBDII code P008B in my Mercury?

- Regular maintenance, such as fuel filter replacement at recommended intervals and using high-quality fuel, can help prevent issues leading to high-pressure fuel system problems.

8. How much can I expect to pay for repairing the OBDII code P008B in my Mercury at a dealership or repair shop?

- Repair costs can vary depending on the exact cause of the issue and labor rates, but expect to pay a few hundred dollars to potentially over a thousand for parts and labor.

9. Will resetting the Check Engine light after fixing the OBDII code P008B in my Mercury prevent it from coming back?

- Clearing the code may temporarily turn off the Check Engine light, but if the underlying issue is not fully resolved, the code may reappear and trigger the light again.

10. Is it safe to continue driving my Mercury if the OBDII code P008B has been resolved?

- Once the issue has been fixed and the code cleared, it is generally safe to drive the vehicle, but it's important to monitor for any return of symptoms or Check Engine light activation.

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