P0089 ISUZU - Fuel Rail Pressure Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

Possible causes

  • Faulty fuel pressure regulator
  • Fuel pressure regulator harness is open or shorted
  • Fuel pressure regulator electrical circuit poor connection
  • Faulty fuel pressure sensor

When is the code detected?

Fuel rail pressure greater than 1450psi over desired rate

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0089 Isuzu 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.
OBDII Code P0089 Isuzu - Fuel Rail Pressure Performance - Engine-Codes.com

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