Spectrum 3.0L GM - DTC 135 FRP Open;Short;High

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DTC 135 FRP Open/Short/High

Conditions for Setting the DTC

 FRP Sensor

 Check Condition-Key ON

 Fault Condition-FRP voltage greater than 4.94 volts

 Fault Condition-FRP voltage less than 0.25 volts

 MIL-ON

Circuit Description

The FRP (Fuel Rail Pressure) is a sensor that monitors the state of the LP fuel in the fuel rail. A pressure

sensor located on the fuel rail monitors the fuel pressure. The output in conjunction with other sensors is

used to determine the appropriate injector pulse to deliver the fuel. A lower output voltage indicates a low-

er pressure, and higher voltage for higher pressure. This fault will set if the signal voltage is less than 0.25

or greater than 4.94 volts.