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DTC 00575/2221: Manifold Absolute Pressure Sensor

  1. Ensure ignition is off. Disconnect wastegate bypass regulator valve connector. Measure resistance between connector terminals. If resistance is 25-45 ohms, go to next step. If resistance is not 25-45 ohms, replace wastegate bypass regulator valve.
  2. Turn ignition on. Measure voltage between valve connector terminal No. 1 and ground. If battery voltage is present, replace DFI ECM. If battery voltage is not present, repair open circuit in wiring.