P1186 Hyundai 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 Hyundai 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.
Code P1186 Hyundai Description
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.
What are the Possible Causes of the DTC P1186 Hyundai?
- 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 Hyundai?
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 Hyundai 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 P1186 Hyundai code?
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Frequently Asked Questions about P1186 Hyundai Code
1. What does the OBDII code P1186 mean for a Hyundai?
P1186 indicates a fuel pressure monitoring issue where the minimum pressure at engine speed is too low.
2. What are the common symptoms of code P1186 in a Hyundai?
Symptoms include rough idling, engine misfires, reduced power, difficulty starting, and poor fuel efficiency.
3. What causes the P1186 code in Hyundai vehicles?
Common causes include a faulty fuel pump, clogged fuel filter, damaged fuel pressure sensor, or a fuel line leak.
4. Can a bad fuel pressure sensor trigger the P1186 code?
Yes, a malfunctioning fuel pressure sensor can cause incorrect readings, leading to the P1186 code.
5. How can I fix the P1186 code on my Hyundai?
Repairs may include replacing the fuel pump, cleaning or replacing the fuel filter, inspecting fuel lines for leaks, or replacing the fuel pressure sensor.
6. Is it safe to drive with the P1186 code active?
Driving with this code is not recommended as low fuel pressure can result in engine performance issues and potential damage.
7. Will replacing the fuel pump always resolve the P1186 code?
Not necessarily. The issue could also be caused by other components like the fuel filter, pressure sensor, or fuel lines, so a proper diagnosis is essential.
8. How can I diagnose the P1186 code on my Hyundai?
Use an OBDII scanner to confirm the code, then check fuel pressure with a gauge and inspect the fuel system components for faults.
9. Can a clogged fuel filter cause the P1186 code?
Yes, a clogged fuel filter can restrict fuel flow, leading to low pressure and triggering the P1186 code.
10. What tools are needed to fix the P1186 code on a Hyundai?
You may need an OBDII scanner, fuel pressure gauge, basic automotive tools, and replacement parts depending on the diagnosis.
Discuss the causes and fixes for P1186 Hyundai OBDII Code
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P1186 HYUNDAI - Fuel Pressure Monitoring-Minimum Pressure at Engine Speed Too Low
Read more: https://www.autocodes.com/p...
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have the same trouble.. i replaced both sensor,the rail pressure sensor and the fuel pressure valve and still have the same trouble.. does leak from the injector can be the problem with this trouble?
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Let me check if there any more information. What model and year is your vehicle?
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what are the other possible causes to come back that p1186 troublecode
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Si tienes exeso de retorno al estanque de algun inyector ..chequea los retornos de los inyectores ..y el q tiene mucho cambialo..y se notara la diferencia
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Hi i have a diesel engine Hyundai 2013 Tucson with the P1186 code error. mechanic seems to be having problems with the sensor. already changed the pressure pump
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