AutoCodes – Chevrolet – P0091 2015 Chevrolet Silverado

P0091 2015 Chevrolet Silverado Code - Fuel Pressure Regulator Control Circuit Low Voltage

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: P0091 2015 Chevrolet Silverado indicates Fuel Pressure Regulator Control Circuit Low Voltage.
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 448

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 P0091 2015 Chevrolet Silverado 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 a short to ground in the high-pressure fuel pump actuator low control circuit.

OBDII Code P0091 2015 Chevrolet Silverado - Fuel Pressure Regulator Control Circuit Low Voltage - AutoCodes.com — P0091 2015 Chevrolet Silverado Code - Fuel Pressure Regulator Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0091 2015 Chevrolet Silverado?

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 P0091 2015 Chevrolet Silverado?

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 P0091 2015 Chevrolet Silverado 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 P0091 2015 Chevrolet Silverado code?

Need more information on how to fix the P0091 2015 Chevrolet Silverado 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 P0091 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0091 in a 2015 Chevrolet Silverado?

The common symptoms of OBDII code P0091 (Fuel Pressure Regulator Control Circuit Low Voltage) in a 2015 Chevrolet Silverado may include poor engine performance, rough idling, reduced fuel efficiency, and possible stalling.

2. What can cause the OBDII code P0091 to trigger in a 2015 Chevrolet Silverado?

The OBDII code P0091 in a 2015 Chevrolet Silverado is typically triggered by issues such as a faulty fuel pressure regulator, damaged wiring or connectors in the fuel pressure regulator circuit, or a problem with the fuel pressure sensor.

3. How can I diagnose the OBDII code P0091 in my 2015 Chevrolet Silverado?

To diagnose the OBDII code P0091 in a 2015 Chevrolet Silverado, you may need to perform a thorough inspection of the fuel pressure regulator, check the wiring and connectors for any damage, and use a scan tool to monitor fuel pressure sensor readings.

4. Can a clogged fuel filter cause the OBDII code P0091 in a 2015 Chevrolet Silverado?

Yes, a clogged fuel filter can sometimes lead to a drop in fuel pressure, which may trigger the OBDII code P0091 (Fuel Pressure Regulator Control Circuit Low Voltage) in a 2015 Chevrolet Silverado.

5. How can I repair the OBDII code P0091 in my 2015 Chevrolet Silverado?

Repairing the OBDII code P0091 in a 2015 Chevrolet Silverado may involve replacing the fuel pressure regulator, repairing any damaged wiring or connectors, cleaning or replacing the fuel filter, and resetting the trouble code with a scan tool.

6. Is it safe to continue driving my 2015 Chevrolet Silverado with the OBDII code P0091?

It is not recommended to continue driving your 2015 Chevrolet Silverado with the OBDII code P0091 (Fuel Pressure Regulator Control Circuit Low Voltage) active, as it can lead to further engine damage and potential safety issues.

7. Can a DIY enthusiast fix the OBDII code P0091 in a 2015 Chevrolet Silverado?

While some DIY enthusiasts may be able to diagnose and repair the OBDII code P0091 in a 2015 Chevrolet Silverado, it is recommended to seek professional help if you are unsure about the repair process or lack the necessary tools and experience.

8. Will resetting the trouble code make the OBDII code P0091 disappear permanently?

Resetting the trouble code associated with OBDII code P0091 in a 2015 Chevrolet Silverado may clear the code temporarily, but if the underlying issue is not fixed, the code is likely to reappear after a certain driving cycle.

9. How much does it typically cost to repair the OBDII code P0091 in a 2015 Chevrolet Silverado?

The cost of repairing the OBDII code P0091 in a 2015 Chevrolet Silverado can vary depending on the specific issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can a bad fuel pump cause the OBDII code P0091 in a 2015 Chevrolet Silverado?

Yes, a failing or faulty fuel pump can sometimes result in low fuel pressure, which can trigger the OBDII code P0091 (Fuel Pressure Regulator Control Circuit Low Voltage) in a 2015 Chevrolet Silverado.