📖 What Does P0191 Mean?
Symptoms
- • Poor engine performance
- • decreased fuel efficiency
- • engine stalling
- • rough idling
- • and decreased power
Common Causes
- • Faulty fuel pressure regulator
- • clogged fuel filter
- • faulty fuel pump
- • or a malfunctioning fuel pressure regulator control circuit
Possible Solutions
1. Check the fuel pressure regulator for proper operation and clean or replace it if necessary. 2. Check the fuel filter for blockages and replace it if necessary. 3. Check the fuel pump for proper operation and replace it if necessary. 4. Check the fuel pressure regulator control circuit for any issues and repair or replace it if necessary.
Fixing this on your car?
Get a vehicle-specific repair guide with exact parts, oil specs, and torque settings for your make and model.
🚙 Get Vehicle-Specific Fix Guide
Select your vehicle to see a customized repair guide with exact parts and specifications:
❓ Common Questions About P0191
Can I drive with code P0191?
You can drive for a short time, but should address code P0191 soon to avoid worsening the problem or failing an emissions test.
How much does it cost to fix P0191?
The estimated repair cost for code P0191 is between $100 and $500. This includes parts and labor for most makes and models.
Is this code easy to fix myself?
This repair is considered moderate. It may require specialized tools or significant disassembly. Professional help is recommended if you aren't an experienced DIYer.
Required Parts
Recommended Tools
Need a Pro?
Complex codes like P0191 can be tricky. Don't risk it if you're unsure.
Recommended Tool
Professional OBD2 Scanner
Read & clear codes, view live data, and reset service lights yourself.
View Best Sellers ↗Related Diagnostic Codes
Other codes that may appear with P0191
P0189: Fuel Temperature Sensor Circuit Malfunction
P0190: Fuel Pressure Regulator Circuit Malfunction
P0192: Fuel Pressure Regulator Control Circuit Low Input
P0193: Fuel Pressure Regulator Control Circuit Low Input
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system