P0091 Chevrolet 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 Chevrolet 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.
Code P0091 Chevrolet Description
What are the Possible Causes of the DTC P0091 Chevrolet?
- 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 Chevrolet?
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 P0091 Chevrolet 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 Chevrolet code?
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Need Help with the Code?
Get the P0091 Chevrolet code diagnosed by a professional: Find a repair shop in your area
Information for Specific Chevrolet Models
- P0091 2014 Chevrolet Silverado — Fuel Pressure Regulator Control Circuit Low Voltage
- P0091 2015 Chevrolet Silverado — Fuel Pressure Regulator Control Circuit Low Voltage
- P0091 2016 Chevrolet Silverado — Fuel Pressure Regulator Control Circuit Low Voltage
- P0091 2017 Chevrolet Silverado — Fuel Pressure Regulator Control Circuit Low Voltage
- P0091 2018 Chevrolet Silverado — Fuel Pressure Regulator Control Circuit Low Voltage
Frequently Asked Questions about P0091 Chevrolet Code
1. What are the common symptoms of OBDII code P0091 in a Chevrolet related to the fuel pressure regulator control circuit?
- Common symptoms include poor engine performance, rough idling, stalling, decreased fuel efficiency, and the illumination of the Check Engine Light.
2. What are the possible causes of OBDII code P0091 in a Chevrolet?
- Potential causes include a faulty fuel pressure regulator, damaged wiring or connectors in the fuel pressure regulator control circuit, a weak fuel pump, or a problem with the powertrain control module (PCM).
3. How can I diagnose the cause of OBDII code P0091 in my Chevrolet?
- To diagnose the issue, you can use a scan tool to retrieve the trouble codes, inspect the fuel pressure regulator and its wiring, test the fuel pump, and check for any loose or damaged connections in the circuit.
4. Can I drive my Chevrolet with OBDII code P0091?
- It is not recommended to drive your vehicle with a P0091 code, as it can lead to further damage to the engine and fuel system. It is best to address the issue promptly.
5. How can I repair OBDII code P0091 in my Chevrolet?
- Repair steps may include replacing the fuel pressure regulator, repairing or replacing damaged wiring or connectors, testing and potentially replacing the fuel pump, and resetting the trouble codes using a scan tool.
6. Are there any maintenance tips to prevent OBDII code P0091 in a Chevrolet?
- Regularly inspecting and maintaining the fuel system components, such as the fuel pressure regulator and fuel pump, can help prevent issues leading to code P0091. Also, ensuring proper fuel quality and system cleanliness is essential.
7. Can a DIY enthusiast fix OBDII code P0091 in a Chevrolet?
- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address code P0091 by following repair guides and using the necessary diagnostic equipment. However, complex issues may require professional assistance.
8. How long does it typically take to repair OBDII code P0091 in a Chevrolet?
- The repair time can vary depending on the exact cause of the code and the extent of the repairs needed. Simple fixes like replacing a fuel pressure regulator may take a couple of hours, while more intricate issues could take longer.
9. Will resetting the trouble codes make OBDII code P0091 go away permanently?
- Resetting the trouble codes may temporarily clear the Check Engine Light associated with P0091, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again during vehicle operation.
10. Is it safe to ignore OBDII code P0091 in a Chevrolet?
- Ignoring OBDII code P0091 can lead to potential engine performance issues, decreased fuel efficiency, and possible damage to the fuel system components. It is recommended to diagnose and repair the issue promptly to prevent further problems.
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