AutoCodes – GMC – P0090 2018 GMC Sierra

P0090 2018 GMC Sierra Code - Fuel Pressure Regulator Control Circuit

Quick Answer

High-pressure fuel is regulated by the high-pressure fuel pump actuator, which is a part of the High-Pressure Fuel Pump. Common causes include Faulty High-Pressure Fuel Pump, High-Pressure Fuel Pump harness is open or shorted, High-Pressure Fuel Pump electrical circuit poor 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: P0090 2018 GMC Sierra indicates Fuel Pressure Regulator Control Circuit.
Common causes: Common causes include Faulty High-Pressure Fuel Pump, High-Pressure Fuel Pump harness is open or shorted, High-Pressure Fuel Pump electrical circuit poor 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 300

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 May 16, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0090 2018 GMC Sierra Description

High-pressure fuel is regulated by the high-pressure fuel pump actuator, which is a part of the High-Pressure Fuel Pump. The high-pressure fuel pump actuator is a solenoid valve. The Engine Control Module (ECM) provides battery voltage on the actuator high control circuit and ground on the actuator low control circuit. Both circuits are controlled through output drivers within the ECM. When deactivated, both drivers are disabled. When activated, the high control circuit driver energizes the high-pressure fuel pump actuator, and the low control circuit driver Pulse-Width Modulates (PWM) the low control circuit to the ground. The ECM monitors the voltage on the circuits to detect a failure. The Diagnostic Trouble Code (DTC) will set if the ECM detects an open circuit in the high-pressure fuel pump actuator low control circuit.

OBDII Code P0090 2018 GMC Sierra - Fuel Pressure Regulator Control Circuit - AutoCodes.com — P0090 2018 GMC Sierra Code - Fuel Pressure Regulator Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0090 2018 GMC Sierra?

Faulty High-Pressure Fuel Pump
High-Pressure Fuel Pump harness is open or shorted
High-Pressure Fuel Pump electrical circuit poor connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0090 2018 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 P0090 2018 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.

Need more information about the P0090 2018 GMC Sierra code?

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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 P0090 2018 GMC Sierra Code

1. What does OBDII code P0090 on a 2018 GMC Sierra indicate?

- OBDII code P0090 on a 2018 GMC Sierra specifically refers to a Fuel Pressure Regulator Control Circuit issue.

2. What are common symptoms of a P0090 code in a 2018 GMC Sierra?

- Common symptoms of the P0090 code in a 2018 GMC Sierra may include rough idling, poor engine performance, and potential stalling.

3. What are the possible causes of a P0090 code in a 2018 GMC Sierra?

- The P0090 code in a 2018 GMC Sierra can be caused by issues such as a faulty fuel pressure regulator, wiring problems, or a malfunctioning fuel pressure sensor.

4. How can I diagnose a P0090 code in my 2018 GMC Sierra?

- Diagnosing a P0090 code in a 2018 GMC Sierra typically involves using a scan tool to retrieve the code, inspecting the fuel pressure regulator and related components, and testing the circuit for continuity.

5. Can I drive my 2018 GMC Sierra with a P0090 code?

- It is not recommended to drive your 2018 GMC Sierra with a P0090 code, as it can lead to poor engine performance and potentially cause further damage to the fuel system.

6. How serious is a P0090 code in a 2018 GMC Sierra?

- A P0090 code in a 2018 GMC Sierra should be addressed promptly, as it can impact the vehicle's fuel efficiency and overall engine performance.

7. What are some repair tips for fixing a P0090 code in a 2018 GMC Sierra?

- Repair tips for addressing a P0090 code may include checking and replacing the fuel pressure regulator, inspecting the wiring for any damage, and ensuring proper connection of the fuel pressure sensor.

8. Can I reset the P0090 code in my 2018 GMC Sierra?

- While you can reset the code using an OBDII scanner, it is important to address the underlying issue causing the P0090 code to prevent it from reoccurring.

9. How much does it cost to repair a P0090 code in a 2018 GMC Sierra?

- The cost to repair a P0090 code in a 2018 GMC Sierra can vary depending on the exact cause of the issue, but it may involve expenses for parts and labor.

10. Is it possible to prevent the P0090 code from appearing in my 2018 GMC Sierra?

- Regular maintenance, including checking the fuel system components and wiring, can help prevent issues that may trigger the P0090 code in a 2018 GMC Sierra.