P2187 - SYSTEM TOO LEAN AT IDLE (BANK 1)

The establishment of diagnostic code P2187 OBD2 implies that the PCM (Powertrain Control Module) detected a fuel mixture for bank 1, which turns out to be poorly idle.

A lean fuel mixture indicates that there is an excess of air and an excessive lack of fuel.

• Check Engine lighting.
• Difficult to start the engine.
• Rough or erratic idling.
• Hesitation during acceleration.
• Loss of motor power.
• A strong smell of fuel.

The factors by which the DTC code P2187 OBDII is stored are as follows:

• Vacuum leaks from the engine, intake manifold, or vacuum supply lines.
• The fuel cap may not fit properly.
• Damaged wiring or connectors.
• The system circuits may be short or open.
• Perhaps the Mass Airflow Sensor (MAF) is contaminated.
• The Manifold Absolute Pressure (MAP) Sensor may be defective.
• The fuel pressure regulator may be in bad condition.
• Defective Oxygen (O2) sensor

The steps to solve the failures related to the error code P2187 OBD2 are

• Check that the front O2 sensor is working properly, it mainly handles the mixing. Replace it if necessary.
• Check the fuel cap for cracks and seal properly.
• Look for air leaks on the Mass Airflow (MAF) Check the hose between the sensor and the intake manifold for cracks and leaks. Repair if necessary.
• Check the PCV valve and its hose for leaks. Make the particular adjustments.
• Check the fuel injectors for leaks. Replace any damaged injectors.