AutoCodes – Generic – P119B

P119B Code - Fuel Rail Pressure Sensor Malfunction

Quick Answer

The fuel rail pressure (FRP) sensor is placed to the fuel rail and measures fuel pressure in the fuel rail. Common causes include Faulty Fuel Rail Pressure Sensor, Fuel Rail Pressure Sensor harness is open or shorted, Fuel Rail Pressure Sensor circuit poor electrical 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: P119B indicates Fuel Rail Pressure Sensor Malfunction.
Common causes: Common causes include Faulty Fuel Rail Pressure Sensor, Fuel Rail Pressure Sensor harness is open or shorted, Fuel Rail Pressure Sensor circuit poor electrical 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.

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Code Popularity 6,181

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P119B Description

The fuel rail pressure (FRP) sensor is placed to the fuel rail and measures fuel pressure in the fuel rail. The sensor transmits voltage signal to the Engine Control Module (ECM). As the pressure increases, the voltage rises. The ECM controls the fuel pressure in the fuel rail by operating high pressure fuel pump. The ECM uses the signal from fuel rail pressure sensor as a feedback signal.
The Engine Control Module (ECM) monitors the Fuel Rail Pressure Sensor. The ECM sets the OBDII code when the Fuel Rail Pressure Sensor is not to factory specifications.

OBDII Code P119B - Fuel Rail Pressure Sensor Malfunction - AutoCodes.com — P119B Code - Fuel Rail Pressure Sensor Malfunction

What does this mean?

What are the Possible Causes of the DTC P119B?

Faulty Fuel Rail Pressure Sensor
Fuel Rail Pressure Sensor harness is open or shorted
Fuel Rail Pressure Sensor circuit poor electrical connection

How to Fix the DTC P119B?

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 P119B 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 P119B code?

Need more information on how to fix the P119B code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P119B code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P119B Buick — NOx Sensor 1 Signal Circuit Low Voltage
P119B Cadillac — NOx Sensor 1 Signal Circuit Low Voltage
P119B Chevrolet — NOx Sensor 1 Signal Circuit Low Voltage
P119B GMC — NOx Sensor 1 Signal Circuit Low Voltage
P119B Infiniti — Fuel Rail Pressure Sensor Malfunction
P119B Nissan — Fuel Rail Pressure Sensor Malfunction

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P119B Code

1. What are the common symptoms of OBDII code P119B (Fuel Rail Pressure Sensor Malfunction)?

- Common symptoms include rough idling, reduced engine performance, stalling, and illuminated Check Engine Light.

2. What are the possible causes of OBDII code P119B?

- Potential causes include a faulty fuel rail pressure sensor, issues with the fuel pressure regulator, fuel pump problems, or wiring issues.

3. How can I diagnose the cause of OBDII code P119B?

- Diagnosing the issue may involve checking the fuel pressure sensor for proper operation, inspecting the fuel system for leaks, and testing the fuel pump's performance.

4. Can I continue driving my vehicle with OBDII code P119B?

- It is not recommended to drive with this code as it can lead to engine performance issues and potential damage. It's best to address the problem promptly.

5. How can I repair OBDII code P119B?

- Repairing the issue may involve replacing the fuel rail pressure sensor, addressing any fuel system problems, or repairing damaged wiring connections.

6. Is it possible to reset OBDII code P119B without fixing the underlying issue?

- While clearing the code may temporarily turn off the Check Engine Light, the problem will likely recur if the root cause is not addressed.

7. Are there any DIY tips for fixing OBDII code P119B?

- DIY tips may include checking for loose or damaged wiring, ensuring proper fuel pressure, and inspecting the fuel rail pressure sensor for any visible issues.

8. Will OBDII code P119B affect fuel efficiency?

- Yes, this code can lead to decreased fuel efficiency due to improper fuel pressure regulation and inefficient engine performance.

9. How long does it typically take to repair OBDII code P119B?

- The repair time can vary depending on the specific cause of the issue, but it may take a few hours to a day to diagnose and fix the problem.

10. Can a mechanic help me with diagnosing and repairing OBDII code P119B?

- Yes, a qualified mechanic can assist in diagnosing the issue using specialized tools and expertise to efficiently repair the fuel rail pressure sensor malfunction.