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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (Engine Controls - Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P0442: EVAP System - Small Leak Detected >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition on, engine off. Remove fuel cap. Using scan tool, monitor FUEL TANK PRESS. SENSOR. If voltage is 1.3-1.6 volts, go to step  3 . If voltage is not 1.3-1.6 volts, go to next step.
  2. If voltage is less than 0.10 volt, see DTC P0452: EVAP FUEL TANK PRESSURE SENSOR CIRCUIT - LOW VOLTAGE  . If voltage is 0.10-1.3 volts or 1.6-4.90 volts, replace fuel tank pressure sensor. If voltage is more than 4.90 volts, see DTC P0453: EVAP FUEL TANK PRESSURE SENSOR CIRCUIT - HIGH VOLTAGE  .
  3. Install fuel cap. Turn ignition on, engine off. Connect EVAP System Tester (J41750-A) to EVAP service port. Preform diagnostic process as described on EVAP system tester to locate a small leak. If leak was identified, repair as necessary. If leak was not identified, see DIAGNOSTIC AIDS  .
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