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Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> External Pages >> Different car >> Section 76 (Engine Control System - DTC) >> DTC P0171, P0174: Fuel Injection System Function >> Diagnostic Procedure >> 4. Check Fuel Pressure

4. Check Fuel Pressure

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. Release fuel pressure to zero. Refer to "FUEL PRESSURE RELEASE ".
  2. Install fuel pressure gauge and check fuel pressure. Refer to "FUEL PRESSURE CHECK ".
    1. At idling: 350 kPa (3.57 kg/cm 2, 51 psi) 

OK or NG 

  1. OK: GO TO 6 .
  2. NG: GO TO 5.
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