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

Quick Answer

The Powertrain Control Module (PCM) provides a 5-Volt supply to the Fuel Rail Pressure Sensor (FRPS). 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 GMC 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 2,658
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on May 29, 2022
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Code P018D GMC Description

The Powertrain Control Module (PCM) provides a 5-Volt supply to the Fuel Rail Pressure Sensor (FRPS). The PCM also provides a ground on the sensor return circuit. The Fuel Rail Pressure Sensor provides a signal to the PCM on the Fuel Rail Pressure Sensor Signal circuit. This sensor signal voltage changes based on the pressure in the fuel rail. The PCM will detect a low signal voltage at low rail pressures. The PCM will detect a high signal voltage during high rail pressure conditions. The PCM will light the MIL lamp immediately after the diagnostic runs and fails. During this time the customer may experience a power and or speed derate. The PCM will turn off the MIL light after the diagnostic runs and passes in four consecutive drive cycles.
OBDII Code P018D GMC - Fuel Pressure Sensor 'B' Circuit High - AutoCodes.com
P018D GMC Code - Fuel Pressure Sensor 'B' Circuit High
What does this mean?

What are the Possible Causes of the DTC P018D GMC?

  • 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 GMC?

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 GMC 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 P018D GMC code?

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

Need Help with the Code?

Get the P018D GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 GMC Code

1. What are common symptoms of OBDII code P018D GMC (Fuel Pressure Sensor 'B' Circuit High)?

Symptoms may include poor engine performance, rough idling, stalling, and a decrease in fuel efficiency.

2. What are the possible causes of OBDII code P018D GMC?

Potential causes include a faulty fuel pressure sensor, wiring issues, corrosion in the sensor connector, or a problem with the engine control module (ECM).

3. How can I diagnose the cause of OBDII code P018D GMC?

You can diagnose this code by performing a visual inspection of the sensor and its wiring, testing the sensor with a multimeter, and checking for any corrosion or loose connections.

4. How can I repair OBDII code P018D GMC?

Repair options may include replacing the fuel pressure sensor, repairing any damaged wiring, cleaning the sensor connector, or resetting the ECM after fixing the issue.

5. Can I drive my vehicle with OBDII code P018D GMC?

It is not recommended to drive your vehicle with this code active, as it can lead to further damage and potentially unsafe driving conditions.

6. Is OBDII code P018D GMC a serious issue?

While not extremely serious in the short term, ignoring this code can lead to decreased engine performance and potential fuel system problems over time.

7. How much does it cost to repair OBDII code P018D GMC?

The cost of repair can vary depending on the exact cause of the code, but it may range from relatively inexpensive for simple fixes to more costly for sensor or ECM replacements.

8. Can I reset OBDII code P018D GMC without fixing the underlying issue?

Resetting the code without addressing the root cause will only temporarily remove the warning light, as the issue will likely reappear once the system detects the problem again.

9. Will OBDII code P018D GMC cause my vehicle to fail an emissions test?

Yes, this code can cause your vehicle to fail an emissions test, as it indicates a problem with the fuel system that can contribute to increased emissions.

10. How can I prevent OBDII code P018D GMC from occurring in the future?

Regular maintenance, such as checking and replacing fuel system components as needed, can help prevent this code from reoccurring in the future.

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