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Boost Gauge Inoperative

  1. Using a voltmeter, check for 11-13 volts on Black/Yellow wire at boost sensor 4-pin connector. See Fig 1 . Boost valve connector is located at turbo boost sensor near center of firewall.
  2. Observe voltmeter reading. If voltmeter reads 11-13 volts, go to BOOST SENSOR OUTPUT CHECK 1  . If voltage is not between 11-13 volts, repair Black/Yellow wire between boost sensor and fuse panel.
Fig 1: Boost Sensor 4-Pin Terminal Identification
G90B08233