P0091 2016 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 2016 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 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0091 2016 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 2016 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 2016 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 2016 Chevrolet Silverado code?
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Frequently Asked Questions about P0091 2016 Chevrolet Silverado Code
1. What does OBDII code P0091 mean on a 2016 Chevrolet Silverado?
P0091 indicates that the fuel pressure regulator control circuit is experiencing low voltage, which can affect fuel pressure regulation.
2. What are the common symptoms of code P0091 in a 2016 Chevrolet Silverado?
Symptoms include engine misfires, poor acceleration, rough idling, difficulty starting, and reduced fuel efficiency.
3. What causes the P0091 code in a 2016 Chevrolet Silverado?
Common causes include a faulty fuel pressure regulator, damaged wiring or connectors, a malfunctioning fuel pump control module, or a failing powertrain control module (PCM).
4. Can a bad fuel pump cause the P0091 code?
Yes, a failing fuel pump or its control module can lead to low voltage in the fuel pressure regulator circuit, triggering the P0091 code.
5. How can I diagnose the P0091 code in my Silverado?
Start by inspecting the wiring and connectors for damage, test the fuel pressure regulator, and check the fuel pump control module for proper operation.
6. Is it safe to drive with the P0091 code active?
Driving with this code can lead to poor engine performance and potential damage to components. It's best to address the issue promptly.
7. How do you fix the P0091 code on a 2016 Chevrolet Silverado?
Repairs may involve replacing the fuel pressure regulator, repairing damaged wiring, or replacing the fuel pump control module if necessary.
8. Can a blown fuse cause the P0091 code?
Yes, a blown fuse in the fuel pump or pressure regulator circuit can disrupt voltage and trigger the P0091 code.
9. Do I need to replace the PCM to fix the P0091 code?
Replacing the PCM is a last resort and only necessary if it is confirmed that the PCM is faulty after other components are ruled out.
10. How much does it cost to fix the P0091 code on a 2016 Chevrolet Silverado?
Repair costs vary but typically range from $150 to $600, depending on whether the issue is with the regulator, wiring, or control module.
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