DTC Troubleshooting: P0048 (172)
DTC P0048:
 Turbocharger Boost Control Solenoid Circuit Shorted to Power
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Clear the DTC with the HDS.
  1. Start the engine.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0048 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the turbocharger boost control solenoid valve and the ECM.■
  1. Turn the ignition switch OFF.
  1. Disconnect the turbocharger boost control solenoid valve 2P connector.
  1. At solenoid side, measure resistance between turbocharger boost control solenoid valve 2P connector terminals No. 1 and No. 2.
Is there about 10−14 Ω at 20 °C (68 °F)?
YES -
Go to Step 8 .
NO -
Go to Step 12 .
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Disconnect ECM connector No. 1 (96P).
  1. Turn the ignition switch ON (II).