P0091 2018 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 2018 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.
Code P0091 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0091 2018 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 2018 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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0091 2018 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 2018 Chevrolet Silverado code?
Need more information on how to fix the P0091 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals
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Frequently Asked Questions about P0091 2018 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P0091 on a 2018 Chevrolet Silverado?
The common symptoms of code P0091 include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.
2. What causes the OBDII code P0091 in a 2018 Chevrolet Silverado?
The P0091 code is typically triggered by issues with the fuel pressure regulator control circuit, such as a faulty fuel pressure regulator, wiring problems, or a defective fuel pump.
3. How can I diagnose the OBDII code P0091 on my 2018 Chevrolet Silverado?
Diagnosing code P0091 involves using a scan tool to check for the code, inspecting the fuel pressure regulator and related wiring for damage, and testing the fuel pressure to ensure it meets specifications.
4. Can a clogged fuel filter cause the OBDII code P0091 on a 2018 Chevrolet Silverado?
Yes, a clogged fuel filter can restrict fuel flow and lead to low voltage in the fuel pressure regulator control circuit, triggering the P0091 trouble code.
5. What are the repair options for fixing OBDII code P0091 on a 2018 Chevrolet Silverado?
Repair options for resolving code P0091 include replacing the fuel pressure regulator, repairing or replacing damaged wiring, checking and replacing the fuel pump if necessary, and ensuring proper fuel system operation.
6. Is it safe to continue driving my 2018 Chevrolet Silverado with the OBDII code P0091 present?
It is not recommended to continue driving with the P0091 code active, as it can lead to further damage to the fuel system and potentially cause more severe engine issues.
7. Can a DIY enthusiast fix the OBDII code P0091 on a 2018 Chevrolet Silverado?
While some aspects of diagnosing and repairing code P0091 can be done by a DIY enthusiast, it is recommended to seek professional help for accurate diagnosis and proper repair of the fuel pressure regulator control circuit.
8. How much does it cost to repair OBDII code P0091 on a 2018 Chevrolet Silverado?
The cost of repairing code P0091 can vary depending on the specific issue causing the code, but it typically ranges from $200 to $500, including parts and labor.
9. Will resetting the OBDII code P0091 on my 2018 Chevrolet Silverado make it go away permanently?
Resetting the code may temporarily clear the warning light, but if the underlying issue causing P0091 is not addressed, the code is likely to reappear once the problem resurfaces.
10. How can I prevent OBDII code P0091 from occurring again on my 2018 Chevrolet Silverado?
Regular maintenance of the fuel system, such as replacing the fuel filter at recommended intervals, checking for fuel leaks, and using high-quality fuel, can help prevent the recurrence of code P0091 on your Silverado.
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