Faulty O2 Sensor
O2 Sensor harness is open or shorted
O2 Sensor circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Linear O2 Sensor Compensation Resistor Open Circuit is the generic description for the P1187 Volkswagen code, but the manufacturer may have a different description for your model and year vehicle. Currently, we have no further information
about the P1187 Volkswagen OBDII code.