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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1367 (Engine Controls And Fuel - Hybrid (Hp2) 6.0L (LFA) - DTC P0010 To DTC P0230) >> DTC P0069 >> Component Testing >> Skewed Sensor Test

Skewed Sensor Test

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, remove the vacuum source from the sensor.
  2. Ignition ON, observe and record the scan tool sensor pressure parameter. This is the first sensor reading.
  3. With the J 23738-A  or J 35555  , apply 5 in Hg (17 kPa) of vacuum to the sensor. Observe and record the scan tool sensor pressure parameter. This is the second sensor reading.
  4. Subtract the second sensor reading from the first sensor reading. Verify that the vacuum decrease is within 1 in Hg (4 kPa) of the applied vacuum.
    • If the vacuum decrease is not within the specified range, replace the sensor.
  5. With the J 23738-A  or J 35555  , apply 10 in Hg (34 kPa) of vacuum to the sensor. Observe and record the scan tool sensor pressure parameter. This is the third sensor reading.
  6. Subtract the third sensor reading from the first sensor reading. Verify that the vacuum decrease is within 1 in Hg (4 kPa) of the applied vacuum.
    • If the vacuum decrease is not within the specified range, replace the sensor.
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