AutoCodes – GMC – P018B 2016 GMC Sierra

P018B 2016 GMC Sierra Code - Fuel Pressure Sensor 'B' Circuit Range/Performance

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: P018B 2016 GMC Sierra indicates Fuel Pressure Sensor 'B' Circuit Range/Performance.
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 420

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 29, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P018B 2016 GMC Sierra 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 P018B 2016 GMC Sierra - Fuel Pressure Sensor 'B' Circuit Range/Performance - AutoCodes.com — P018B 2016 GMC Sierra Code - Fuel Pressure Sensor 'B' Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P018B 2016 GMC Sierra?

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 P018B 2016 GMC Sierra?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P018B 2016 GMC Sierra 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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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 P018B 2016 GMC Sierra Code

1. What does the OBDII code P018B mean on a 2016 GMC Sierra?

P018B indicates an issue with the Fuel Pressure Sensor 'B' Circuit, specifically that its signal is out of the expected range or not performing as anticipated.

2. What are the common symptoms of code P018B?

Symptoms may include poor fuel efficiency, difficulty starting, engine misfires, rough idling, reduced power, or the check engine light being illuminated.

3. What causes the P018B code to appear?

Common causes include a faulty fuel pressure sensor, damaged or corroded wiring in the circuit, a malfunctioning fuel pump, or an issue with the vehicle's PCM (Powertrain Control Module).

4. Can a dirty fuel filter trigger the P018B code?

While not a direct cause, a clogged fuel filter can lead to inconsistent fuel pressure, which may contribute to sensor-related issues and trigger the code.

5. How do you diagnose the P018B code?

Diagnosis typically involves using a scan tool to verify the code, inspecting the fuel pressure sensor and its wiring, checking fuel pressure levels, and testing the sensor's output against manufacturer specifications.

6. Can you drive with the P018B code active?

Driving with this code is not recommended, as it can lead to poor engine performance and potentially cause further damage to the fuel system or engine components.

7. How much does it cost to fix the P018B code on a 2016 GMC Sierra?

Repair costs can vary but typically range from $100 to $300, depending on whether the issue is with the sensor, wiring, or other components.

8. Does the P018B code always mean the fuel pressure sensor is bad?

No, the code could also be caused by wiring issues, fuel pump problems, or even a PCM malfunction. Proper diagnosis is essential.

9. What tools are needed to fix the P018B code?

Basic tools include a scan tool, a multimeter for testing circuits, and potentially a fuel pressure gauge. Advanced tools may be required for sensor or PCM diagnostics.

10. Can a P018B code clear itself after repairs?

If the issue is resolved, the code may clear after several drive cycles. Alternatively, a scan tool can be used to manually clear the code.