Engine-Codes.com | All About OBDII Engine Codes
Engine-Codes.com | All About OBDII Engine Codes

P0089 GMC

P0089 GMC - Fuel Pressure 1 Control Performance

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P0089 GMC Comments |  Add Comment
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)
Help with Possible causes What does this mean?
When is the code detected?
If the fuel rail pressure sensor indicates a pressure more than 20 MPa greater than desired, diagnostic trouble code (DTC) P0089 will set.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0089 GMC 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.

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