P1187 Hyundai Code - Fuel Pressure Monitoring - Regulator Valve Stick
Quick Answer
Fuel pressure monitoring is used to detect the troubles and the fuel leakage in high pressure system. Common causes include Faulty Fuel Pressure Regulator (FPR), Faulty Rail Pressure Sensor (RPS), Engine Control Module (ECM). 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
- P1187 Hyundai indicates Fuel Pressure Monitoring - Regulator Valve Stick.
- Common causes
- Common causes include Faulty Fuel Pressure Regulator (FPR), Faulty Rail Pressure Sensor (RPS), Engine Control Module (ECM).
- 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 P1187 Hyundai Description
The Engine Control Module (ECM) determines the rail pressure value as a function of the engine’s operating conditions and controls the fuel pressure regulator to ensure that the rail pressure reaches the required value.
Fuel pressure in the fuel line including the pumps and injector are continuously monitored during engine running.
If the rail pressure is excessive, the fuel pressure regulator opens and a portion of the fuel is returned from the rail to the fuel tank via a collector line. If the rail pressure is too low, the fuel pressure regulator closes.
The fuel pressure regulator closes. the fuel pressure regulator is installed in the tail end of high pressure accumulator.
In case of the insufficient fuel supply in the fuel line, the engine symptoms will occur a shut down and a starting impossible.
If the fuel pressure monitoring in engine fuel pressure line generates threshold value, the ECM judged this as a fault and the P1187 code is set.
What are the Possible Causes of the DTC P1187 Hyundai?
- Faulty Fuel Pressure Regulator (FPR)
- Faulty Rail Pressure Sensor (RPS)
- Engine Control Module (ECM)
How to Fix the DTC P1187 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 P1187 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 P1187 Hyundai code?
Need more information on how to fix the P1187 Hyundai code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1187 Hyundai code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1187 Hyundai Code
What does the OBDII code P1187 mean on a Hyundai?
P1187 on a Hyundai indicates an issue with the fuel pressure monitoring system, specifically that the regulator valve may be sticking.
What are the common symptoms of code P1187 in a Hyundai?
Common symptoms include difficulty starting the engine, rough idling, reduced fuel efficiency, and potential engine stalling.
What causes the P1187 code to appear in a Hyundai?
The primary causes include a sticking fuel pressure regulator valve, a malfunctioning fuel pump, clogged fuel injectors, or electrical issues in the fuel system.
Can I drive my Hyundai with a P1187 code?
Driving with a P1187 code is not recommended, as it could lead to engine performance issues or cause further damage to the fuel system.
How do I fix a P1187 code on my Hyundai?
Fixes may include cleaning or replacing the fuel pressure regulator valve, inspecting the fuel pump, checking for clogged injectors, or repairing any damaged wiring or connections.
What tools are needed to diagnose a P1187 code on a Hyundai?
You’ll need an OBDII scanner, a fuel pressure gauge, and basic automotive tools to inspect and test the fuel system components.
How much does it cost to repair a P1187 code on a Hyundai?
Repair costs vary but typically range from $150 to $500, depending on whether the fuel pressure regulator valve or other components need replacement.
Can a dirty fuel filter cause the P1187 code in a Hyundai?
Yes, a dirty or clogged fuel filter can restrict fuel flow, potentially contributing to issues with the fuel pressure regulator valve and triggering the code.
Does a P1187 code always mean the regulator valve is faulty?
Not necessarily. The code indicates the valve may be sticking, but it could also be due to related issues like fuel pump failure or electrical faults.
How do I prevent the P1187 code from recurring in my Hyundai?
Regular maintenance, such as replacing the fuel filter and using quality fuel, can help prevent fuel system issues that lead to this code.
Discuss the causes and fixes for P1187 Hyundai OBDII Code
-
Its a 2005 crdi getz....I replaced fuel pump motor in the tank before it showed those two codes....my suspicion was "reduced fuel flow"......
-
The problem started right after you replaced the fuel pump?
Looks like both codes are related to the "Fuel Pressure Regulator" which is part of the fuel pump.
Either you didn't properly installed the fuel pump or the fuel pump you got is damage.P1183 HYUNDAI - Fuel Pressure Regulator Open
Read more: https://www.autocodes.com/p...
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
