AutoCodes – KIA – P0231 KIA

P0231 KIA Code - Electric Fuel Pump Relay Open or Short Circuit

Quick Answer

The Engine Control Module (ECM) provides ignition positive voltage to the coil side of the fuel pump relay. Common causes include Blown Fuel Pump fuse, Open Fuel Pump Monitor Circuit, Faulty Fuel Pump Relay. 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: P0231 KIA indicates Electric Fuel Pump Relay Open or Short Circuit.
Common causes: Common causes include Blown Fuel Pump fuse, Open Fuel Pump Monitor Circuit, Faulty Fuel Pump Relay.
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 7,342

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 Apr 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0231 KIA Description

The Engine Control Module (ECM) provides ignition positive voltage to the coil side of the fuel pump relay. When the ignition switch is first turned ON, the ECM energizes the fuel pump relay, which applies power to the fuel pump. The ECM enables the fuel pump relay as long as the engine is cranking or running, and crankshaft reference pulses are received. If no crankshaft reference pulses are received, the ECM de-energizes the fuel pump relay after 2 seconds. The ECM monitors the voltage on the fuel pump relay control circuit.

OBDII Code P0231 KIA - Electric Fuel Pump Relay Open or Short Circuit - AutoCodes.com — P0231 KIA Code - Electric Fuel Pump Relay Open or Short Circuit

What does this mean?

What are the Possible Causes of the DTC P0231 KIA?

Blown Fuel Pump fuse
Open Fuel Pump Monitor Circuit
Faulty Fuel Pump Relay
Damaged Engine Control Module (ECM)

How to Fix the DTC P0231 KIA?

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 P0231 KIA 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 P0231 KIA code?

Need more information on how to fix the P0231 KIA code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0231 KIA code diagnosed by a professional: Find a repair shop in your area

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 P0231 KIA Code

1. What are the common symptoms of OBDII code P0231 in a KIA related to the Electric Fuel Pump Relay?

The common symptoms include engine stalling, hard starting, poor engine performance, and the vehicle failing to start.

2. What are the possible causes of the OBDII code P0231 in a KIA indicating an Electric Fuel Pump Relay Open or Short Circuit?

Possible causes include a faulty fuel pump relay, damaged wiring or connectors in the fuel pump circuit, or a defective fuel pump.

3. How can I diagnose the Electric Fuel Pump Relay issue causing OBDII code P0231 in my KIA?

You can use a multimeter to test the fuel pump relay for continuity and check the wiring for any signs of damage or corrosion. Additionally, you can check the fuel pump operation and pressure.

4. Can a DIY enthusiast repair the Electric Fuel Pump Relay Open or Short Circuit issue related to OBDII code P0231 in a KIA?

Yes, if you have the necessary tools and knowledge, you can replace the fuel pump relay or repair any damaged wiring yourself.

5. Are there any safety precautions to consider when working on the Electric Fuel Pump Relay in a KIA with OBDII code P0231?

Make sure to disconnect the vehicle's battery before working on any electrical components to avoid the risk of electrical shock or damage.

6. Will driving the KIA with OBDII code P0231 indicating an Electric Fuel Pump Relay issue cause further damage?

Continuing to drive the vehicle with this issue can lead to fuel pump failure, which may result in the vehicle stalling or not starting at all.

7. How important is it to address the OBDII code P0231 related to the Electric Fuel Pump Relay in a timely manner?

It is crucial to address this issue promptly to prevent potential safety hazards and further damage to the fuel pump system.

8. Can a malfunctioning Electric Fuel Pump Relay cause poor fuel efficiency in a KIA with OBDII code P0231?

Yes, a faulty fuel pump relay can lead to improper fuel delivery, resulting in decreased fuel efficiency and potential engine performance issues.

9. Is resetting the OBDII system enough to clear the P0231 code related to the Electric Fuel Pump Relay in a KIA?

While resetting the system may temporarily clear the code, it is essential to diagnose and repair the underlying issue causing the code to prevent it from reoccurring.

10. How can a mechanic assist in resolving the OBDII code P0231 indicating an Electric Fuel Pump Relay problem in a KIA?

A mechanic can perform a thorough diagnostic to pinpoint the exact cause of the issue and provide professional repair or replacement of the faulty components to rectify the problem effectively.