P0090 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P0090 – Fuel Pressure Regulator 1 Control Circuit

 

P0090 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P0090 Possible Causes

 

Faulty fuel pressure sensor,Fuel pressure sensor harness is open or shorted,Fuel pressure sensor electrical circuit poor connection,Faulty Engine Control Module (ECM)

 

P0090 Description

 

The Engine Control Module (ECM) uses commanded fuel pump flow to determine a desired fuel rail pressure. The actual fuel pressure is monitored using the Fuel Rail Pressure (FRP) Sensor.