AutoCodes – Land Rover – P1231 Land Rover

P1231 Land Rover Code - High Speed Fuel Pump Relay Activated

Quick Answer

The Engine Control Module (ECM) energized the high speed fuel pump and detected no current flow on the circuit. Common causes include Faulty High Speed Fuel Pump, High Speed Fuel Pump harness is open or shorted, High Speed Fuel Pump 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: P1231 Land Rover indicates High Speed Fuel Pump Relay Activated.
Common causes: Common causes include Faulty High Speed Fuel Pump, High Speed Fuel Pump harness is open or shorted, High Speed Fuel Pump 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 2,197

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 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1231 Land Rover Description

The Engine Control Module (ECM) energized the high speed fuel pump and detected no current flow on the circuit.

OBDII Code P1231 Land Rover - High Speed Fuel Pump Relay Activated - AutoCodes.com — P1231 Land Rover Code - High Speed Fuel Pump Relay Activated

What does this mean?

What are the Possible Causes of the DTC P1231 Land Rover?

Faulty High Speed Fuel Pump
High Speed Fuel Pump harness is open or shorted
High Speed Fuel Pump circuit poor electrical connection

How to Fix the DTC P1231 Land Rover?

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 P1231 Land Rover 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 P1231 Land Rover code?

Need more information on how to fix the P1231 Land Rover code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P1231 Land Rover Code

1. What are the common symptoms of OBDII code P1231 in a Land Rover related to the high-speed fuel pump relay activation?

- Common symptoms include engine misfires, stalling, poor acceleration, and difficulty starting the vehicle.

2. What can cause the OBDII code P1231 in a Land Rover?

- The code P1231 is typically triggered by a faulty high-speed fuel pump relay, wiring issues, or a malfunctioning fuel pump control module.

3. How can I diagnose the high-speed fuel pump relay issue causing the OBDII code P1231 in my Land Rover?

- You can diagnose the issue by checking the relay for power and ground, testing the fuel pump operation, and inspecting the wiring for any damage or corrosion.

4. Can a DIY enthusiast repair the OBDII code P1231 issue in a Land Rover?

- Yes, if you have the necessary tools and knowledge, you can replace the high-speed fuel pump relay or repair any wiring issues causing the code P1231 in your Land Rover.

5. Is it safe to continue driving my Land Rover with the OBDII code P1231 related to the high-speed fuel pump relay?

- It is not recommended to drive your vehicle with the code P1231 as it can lead to fuel delivery issues and potential engine damage. It is best to address the problem promptly.

6. How much does it typically cost to repair the OBDII code P1231 in a Land Rover at a professional repair shop?

- The cost of repairing the high-speed fuel pump relay issue causing the code P1231 can vary depending on the exact cause, but it may range from $200 to $500.

7. Can a faulty fuel pump also trigger the OBDII code P1231 in a Land Rover?

- Yes, a malfunctioning fuel pump or fuel pump control module can also cause the high-speed fuel pump relay to be activated, leading to the OBDII code P1231.

8. Are there any preventive measures to avoid encountering the OBDII code P1231 in a Land Rover?

- Regular maintenance, such as checking the fuel system components and wiring for any signs of wear or damage, can help prevent issues that may trigger the code P1231.

9. Will resetting the OBDII code P1231 in my Land Rover make the problem go away permanently?

- Simply resetting the code without addressing the underlying issue, such as the faulty high-speed fuel pump relay, will not solve the problem permanently. It is important to diagnose and repair the root cause.

10. How urgent is it to address the OBDII code P1231 in a Land Rover once it appears?

- It is advisable to address the code P1231 promptly to prevent potential fuel delivery issues, engine performance problems, and further damage to the vehicle.