P0190 CHEVROLET – Fuel Rail Pressure Sensor Circuit Malfunction

 

P0190: DIY Repairing Video Tutorial

https://youtu.be/a8uegBCl67k

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P0190 CHEVROLET Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light),Engine will not start  

P0190 CHEVROLET Possible Causes

  Low or no fuel,Faulty Rail Pressure (FRP) Sensor,Faulty Rail Pressure (FRP) harness is open or shorted,Faulty Rail Pressure (FRP) circuit poor electrical connection,Faulty Fuel Pump  

P0190 CHEVROLET Description

  The Fuel Rail Pressure (FRP) sensor has a 5-volt reference circuit, a signal circuit, and a low reference circuit. The Engine Control Module (ECM) monitors the voltage on the FRP sensor circuits. When the fuel pressure is high, the signal voltage is high. When the fuel pressure is low, the signal voltage is low. The fuel pressure regulator has a solenoid supply voltage circuit and a solenoid control circuit. The ECM controls the fuel pressure regulator, which regulates high pressure fuel that goes to the fuel injector rails and the injectors.