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Home >> Pontiac >> 2007 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls & Fuel - 3.8L - DTC P0601 To U0107) >> DTC P2228 or P2229 >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: You must perform the Circuit/System Testing before proceeding with the Component Test.
  1. Turn ON the ignition with the engine OFF and remove the BARO sensor.
  2. Install a 3-amp fused jumper wire between the 5-volt reference terminal C of the sensor and 5-volt reference.
  3. Install a jumper wire between the low reference terminal A of the sensor and ground.
  4. Install a jumper wire at the signal terminal B of the BARO sensor.
  5. Connect a DMM between the jumper wire from terminal B of the sensor and ground.
  6. Install the J 23738-A  to the BARO sensor vacuum port. See Special Tools . Slowly apply vacuum to the sensor while monitoring the voltage on the DMM. The voltage should vary between 5.2-0 volts without any spikes or dropouts.
    • If the voltage is not within the specified range or is erratic, replace the BARO sensor.
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