P0091 2017 GMC Sierra Code - Fuel Pressure Regulator Control Circuit Low Voltage
Quick Answer
The P0091 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the fuel pressure regulator control circuit is experiencing low voltage. Common causes include Faulty fuel pressure regulator, Damaged wiring or connectors in the control circuit, Malfunctioning fuel pump. 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 2017 GMC Sierra indicates Fuel Pressure Regulator Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty fuel pressure regulator, Damaged wiring or connectors in the control circuit, Malfunctioning fuel pump.
- 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 P0091 2017 GMC Sierra Description
The P0091 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the fuel pressure regulator control circuit is experiencing low voltage. The fuel pressure regulator is a crucial component of the vehicle's fuel system, responsible for maintaining a consistent and optimal fuel pressure for the engine to operate efficiently. When the control circuit voltage is too low, it can lead to a variety of performance issues and potential long-term damage if not addressed promptly.
Common Causes of P0091 2017 GMC Sierra
- Faulty fuel pressure regulator
- Damaged wiring or connectors in the control circuit
- Malfunctioning fuel pump
- Issues with the engine control module (ECM)
- Clogged fuel filter
Symptoms of P0091 2017 GMC Sierra
- Rough idling
- Stalling
- Poor acceleration
- Decreased fuel efficiency
- Engine misfires
How to Fix P0091 2017 GMC Sierra
- Begin by conducting a thorough inspection of the fuel pressure regulator, wiring, and connectors to identify any visible damage or issues.
- Test the fuel pressure regulator using a fuel pressure gauge to determine if it is functioning within the manufacturer's specifications.
- Check the fuel pump for proper operation and pressure output.
- Inspect the ECM for any fault codes or malfunctions that may be affecting the fuel pressure regulator control circuit.
- Replace any faulty components such as the fuel pressure regulator, wiring, connectors, fuel pump, or ECM as needed to resolve the low voltage issue.
Cost to Fix P0091 2017 GMC Sierra
The typical repair costs for addressing a P0091 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty fuel pressure regulator can cost between $150 to $300, while repairing damaged wiring or connectors may range from $50 to $150. If the fuel pump needs to be replaced, the cost can be anywhere from $300 to $800. Additionally, diagnosing the issue and labor costs can add another $100 to $300 to the total repair bill. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the shop's labor rates. It's recommended to consult with a professional mechanic for a more accurate cost estimate.
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Frequently Asked Questions about P0091 2017 GMC Sierra Code
What does the OBDII code P0091 mean on a 2017 GMC Sierra?
P0091 indicates a low voltage issue in the fuel pressure regulator control circuit, which affects the vehicle's ability to regulate fuel pressure properly.
What are common symptoms of the P0091 code in a 2017 GMC Sierra?
Symptoms include poor engine performance, hard starting, reduced fuel efficiency, stalling, and the Check Engine Light turning on.
What causes the P0091 code to appear in a 2017 GMC Sierra?
Common causes include a faulty fuel pressure regulator, damaged wiring or connectors in the control circuit, a malfunctioning fuel pump, or a failed powertrain control module (PCM).
Can I drive my 2017 GMC Sierra with a P0091 code?
Driving with a P0091 code is not recommended as it can lead to poor performance, potential stalling, and further damage to the fuel system.
How do I diagnose the P0091 code on my GMC Sierra?
Diagnosis involves inspecting the wiring and connectors for damage, testing the fuel pressure regulator, checking the circuit voltage, and verifying the PCM functionality using a scan tool.
How do I fix the P0091 code on a 2017 GMC Sierra?
Repairs may include replacing the fuel pressure regulator, repairing damaged wiring or connectors, replacing a faulty fuel pump, or reprogramming or replacing the PCM if necessary.
What tools are needed to troubleshoot a P0091 code?
You’ll need an OBDII scanner, a multimeter for voltage testing, and possibly a fuel pressure gauge to check the fuel system's performance.
Can a dirty fuel filter cause the P0091 code?
While a dirty fuel filter can restrict fuel flow, it is not a direct cause of the P0091 code, which specifically relates to a low voltage issue in the fuel pressure regulator circuit.
How much does it cost to repair a P0091 code on a 2017 GMC Sierra?
Repair costs vary depending on the issue. Replacing a fuel pressure regulator typically costs $200-$400, while wiring repairs or PCM replacement can cost more.
Will clearing the P0091 code with a scanner fix the issue?
Clearing the code may temporarily remove the Check Engine Light, but the underlying problem must be diagnosed and repaired to prevent the code from returning.
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