The OBD code P2187 for Hyundai indicates a system too lean at idle on bank 1. This affects the fuel system.
Symptoms include the engine light being on, hard starting when cold.
Causes can be intake air leaks, faulty oxygen sensor, ignition misfiring, or faulty fuel injectors.
It’s a moderate issue.
To fix, check for the mentioned causes and inspect wiring and connectors for damage.
Repair Importance Level | 10.0 (Out of 10) |
Estimated Repair Time | Approximately 1.0 hour |
Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the Hyundai p2187 OBD Code
The vehicle may exhibit rough idle, lack of power, or poor fuel economy with code P2187.
- Symptoms: Engine Light ON.
- Hard to start engine when cold.
- Rough idle.
- Decreased fuel efficiency.
- Hesitation or lack of power during acceleration.
Causes of the Hyundai p2187 OBD Code
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P2187 in Hyundai indicates a lean airfuel mixture, often due to vacuum leaks or faulty oxygen sensors.
- P2187 can be caused by intake air leaks.
- A faulty front heated oxygen sensor.
- Ignition misfiring.
- Faulty fuel injectors.
- Incorrect fuel pressure.
- Lack of fuel.
- A faulty Mass Air Flow (MAF) sensor.
- Or an incorrect Positive Crankcase Ventilation (PCV) hose connection.
Fixing Hyundai Error Code p2187 Step By Step
Address the P2187 fault code on a Hyundai by inspecting for vacuum leaks in the intake system.
- To fix Hyundai OBDII code p2187, first, review the ‘Possible Causes’ mentioned above.
- Visually examine the corresponding wiring harness and connectors for any damage.
- Check the connector pins for signs of being broken, bent, pushed out, or corroded.
- Inspect the intake system for any vacuum leaks.
- Clean or replace the Mass Air Flow (MAF) sensor if necessary.
- Reset the Engine Control Module (ECM) to clear the code.
- Perform a fuel pressure test to ensure proper fuel delivery.
- If the issue persists, consider replacing the fuel filter or the fuel pump.
Cost Of Fixing Hyundai p2187 Fault Code
Diagnosing and repairing Hyundai P2187 typically involves checking for vacuum leaks and cleaning the mass airflow sensor.
The cost to diagnose and fix Hyundai OBD code P2187 typically ranges from $75 to $150, based on a 1. 0hour estimated repair time.
Factors like shop rates and complexity can affect the final cost.
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Details of the Hyundai p2187 OBD Code
Hyundai fault code P2187 indicates a lean fuel condition in bank 1.
Hyundai OBD code P2187 means that the system is detecting a lean fuel condition at idle on bank 1. This code is triggered by the Engine Control Module (ECM) based on the signals received from the oxygen sensors.
The ECM monitors the airfuel mixture and if it detects that the mixture is too lean, it will trigger this fault code.
This could be caused by issues such as a vacuum leak, a faulty oxygen sensor, a dirty or clogged fuel injector, or a problem with the fuel pressure.
Mechanic’s Tech Notes
Detailed information on Hyundai fault code P2187, including symptoms, causes, and solutions for efficient troubleshooting.
To diagnose and fix OBDII code P2187 on a Hyundai, start by checking for vacuum leaks in the intake system.
Inspect the PCV system for leaks or blockages.
Use a scan tool to monitor fuel trims and oxygen sensor data to pinpoint the issue.
Check the fuel pressure to ensure it’s within specifications.
Verify the operation of the mass airflow sensor (MAF) and the oxygen sensors.
If all checks out, consider cleaning the throttle body and performing an idle relearn procedure.
If the problem persists, further diagnosis may be needed, such as checking the fuel injectors or the engine’s mechanical condition.
FAQ
Common causes of OBD code P2187 in a Hyundai: intake air leaks, faulty front heated oxygen sensor, ignition misfiring, faulty fuel injectors, incorrect fuel pressure.
OBD code P2187 in a Hyundai indicates a lean fuel mixture. It’s serious and can cause starting issues. Get it checked before driving.
Diagnose P2187 by checking for intake leaks, faulty oxygen sensor, misfires, fuel system issues. Inspect wiring, connectors for damage, corrosion. Fix as needed.

Wrap Up
If your Hyundai is displaying OBD code p2187 and you notice poor engine performance, rough idling, or decreased fuel efficiency, it could be caused by a lean airfuel mixture due to a vacuum leak, faulty oxygen sensor, or a clogged fuel filter.
To address Hyundai OBD code p2187, start by checking for vacuum leaks in the intake system, inspecting the oxygen sensor for proper operation, and ensuring the fuel filter is clean and not restricting fuel flow.
Additionally, testing the fuel pressure and examining the intake manifold gasket for leaks can help pinpoint the issue.