AutoCodes – KIA – P1186 KIA

P1186 KIA Code - Fuel Pressure Monitoring-Minimum Pressure at Engine Speed Too Low

Quick Answer

As input rail pressure sensor signal, the Engine Control Module (ECM) of the standard rail diesel engine controls Fuel Pressure Regulator Valve (integrated with a high-pressure pump) to maintain optimum rail pressure according to current engine rpm and load. Common causes include Faulty Fuel Pressure Regulator Valve (FPRV) stuck open, Faulty Fuel Rail Pressure Sensor (RPS), Fuel Rail Pressure Sensor harness is open or shorted. 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: P1186 KIA indicates Fuel Pressure Monitoring-Minimum Pressure at Engine Speed Too Low.
Common causes: Common causes include Faulty Fuel Pressure Regulator Valve (FPRV) stuck open, Faulty Fuel Rail Pressure Sensor (RPS), Fuel Rail Pressure Sensor harness is open or shorted.
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 30,208

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 23, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1186 KIA Description

As input rail pressure sensor signal, the Engine Control Module (ECM) of the standard rail diesel engine controls Fuel Pressure Regulator Valve (integrated with a high-pressure pump) to maintain optimum rail pressure according to current engine rpm and load. However, when the problem that leads rail pressure out of target value intended by ECM occurs due to mechanical or electrical reasons, ECM shuts the engine down and sets Diagnostic Trouble Code (DTC) by limiting the fuel (stopping injector operation) to prevent the engine from being controlled abnormally. "Rail Pressure Monitoring Error" is the DTC that diagnoses the following:
1. Supplying state of low-pressure fuel
2. Mechanical operating conditions of the high-pressure pump
3. Indirectly based on Rail Pressure Sensor (RPS) output voltage and RPS duty.

OBDII Code P1186 KIA - Fuel Pressure Monitoring-Minimum Pressure at Engine Speed Too Low - AutoCodes.com — P1186 KIA Code - Fuel Pressure Monitoring-Minimum Pressure at Engine Speed Too Low

What does this mean?

What are the Possible Causes of the DTC P1186 KIA?

Faulty Fuel Pressure Regulator Valve (FPRV) stuck open
Faulty Fuel Rail Pressure Sensor (RPS)
Fuel Rail Pressure Sensor harness is open or shorted
Fuel Rail Pressure Sensor circuit poor electrical connection

How to Fix the DTC P1186 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 P1186 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.

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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 P1186 KIA Code

1. What are the common symptoms of OBDII code P1186 in a KIA vehicle?

- Common symptoms of code P1186 in a KIA may include rough idling, engine stalling, lack of power, and poor fuel efficiency.

2. What could be causing the OBDII code P1186 in a KIA?

- The code P1186 in a KIA is typically triggered by issues such as a faulty fuel pump, clogged fuel filter, fuel pressure regulator problems, or issues with the fuel injectors.

3. How can I diagnose the OBDII code P1186 in my KIA?

- To diagnose code P1186 in a KIA, you can use an OBDII scanner to read the code and then inspect the fuel system components mentioned earlier to identify the root cause of the issue.

4. Can a clogged fuel filter trigger the OBDII code P1186 in a KIA?

- Yes, a clogged fuel filter can restrict fuel flow and lead to insufficient fuel pressure, triggering the OBDII code P1186 in a KIA.

5. What are some repair tips for fixing OBDII code P1186 in a KIA?

- Repair tips for resolving code P1186 in a KIA may include replacing the fuel filter, testing and potentially replacing the fuel pump, checking and cleaning the fuel injectors, and inspecting the fuel pressure regulator.

6. Is it safe to continue driving my KIA with the OBDII code P1186 present?

- It is not recommended to drive your KIA with the OBDII code P1186 present, as it can lead to poor engine performance and potential damage to the fuel system components.

7. How critical is it to address the OBDII code P1186 in a timely manner?

- It is important to address the OBDII code P1186 promptly to prevent further damage to the fuel system and ensure optimal engine performance and fuel efficiency.

8. Can a DIY enthusiast fix the OBDII code P1186 issue in a KIA?

- Depending on your skill level and access to tools, a DIY enthusiast may be able to address the OBDII code P1186 in a KIA by following repair guides and tutorials specific to the issue.

9. Will resetting the OBDII system clear the P1186 code in a KIA?

- Resetting the OBDII system may temporarily clear the P1186 code, but if the underlying issue causing the code is not resolved, it is likely to reappear after driving the vehicle.

10. How can a professional mechanic help in resolving the OBDII code P1186 in a KIA?

- A professional mechanic can conduct a thorough diagnosis, utilize specialized tools for testing, and provide expert repair services to accurately address the OBDII code P1186 in a KIA.