DTC Troubleshooting: P250E (168)
DTC P250E:
 Engine Oil Level Sensor Intermittent Interruption
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, and let it idle for 1 minute.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P250E 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 engine oil level sensor and the ECM.■
  1. Turn the ignition switch OFF.
  1. Check for poor or loose connections and terminals at these locations:
    • Oil level sensor
    • ECM
    • Engine ground (G101)
    • Body ground
Are the connections and terminals OK?
YES -
Go to Step 7 .
NO -
Repair the connectors or terminals, then go to Step 12 .
  1. Substitute a known-good engine oil level sensor.
  1. Turn the ignition switch ON (II).
  1. Clear the DTC with the HDS.
  1. Start the engine, and let it idle for 1 minute.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P250E indicated?
YES -
Go to Step 16 .
NO -
Replace the original engine oil level sensor, then go to Step 12 .
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Start the engine, and let it idle for 1 minute.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P250E indicated?
YES -
Check for poor connections or loose terminals at the engine oil level sensor and the ECM, then go to Step 1 .
NO -
Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■
  1. Update the ECM if it does not have the latest software, or substitute a known-good ECM.
  1. Start the engine, and let it idle for 1 minute.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P250E indicated?
YES -
Check for poor connections or loose terminals at the engine oil level sensor and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 17 . If the ECM was substituted, go to Step 1 .
NO -
If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■