DTC Troubleshooting: P250E (168) (R18A: M/T)

DTC Troubleshooting: P250E (168)

DTC P250E:  Engine Oil Level Sensor Intermittent Interruption


NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

1.Turn the ignition switch ON (II).

2.Clear the DTC with the HDS.

3.Start the engine, and let it idle for 1 minute.

4.Check for Temporary DTCs or DTCs with the HDS.

Is DTC P250E indicated?


YES - Go to 5.


NO - Intermittent failure, system is OK at this time.Check for poor connections or loose terminals at the engine oil level sensor and the ECM/PCM.n


5.Turn the ignition switch OFF.

6.Check for poor or loose connections and terminals at these locations:
  • Oil level sensor
  • ECM/PCM
  • Engine ground (G101)
  • Body ground

Are the connections and terminals OK?


YES - Go to 7.


NO - Repair the connectors or terminals, then go to 12.


7.Substitute a known-good engine oil level sensor.

8.Turn the ignition switch ON (II).

9.Clear the DTC with the HDS.

10.Start the engine, and let it idle for 1 minute.

11.Check for Temporary DTCs or DTCs with the HDS.

Is DTC P250E indicated?


YES - Go to 16.


NO - Replace the original engine oil level sensor, then go to 12.


12.Turn the ignition switch ON (II).

13.Reset the ECM/PCM with the HDS.

14.Do the ECM/PCM idle learn procedure.

15.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P250E is indicated, check for poor connections or loose terminals at the engine oil level sensor and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - Troubleshooting is complete.n


16.Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.

17.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P250E is indicated, check for poor connections or loose terminals at the engine oil level sensor and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n