DTC Troubleshooting: P250A (168)
DTC P250A:
 Engine oil level sensor Circuit Malfunction
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. Wait 5 seconds.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P250A 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. Disconnect the engine oil level sensor 3P connector.
  1. Turn the ignition switch ON (II).
  1. Measure voltage between engine oil level sensor 3P connector terminal No. 3 and body ground.
Is there battery voltage?
YES -
Go to Step 9 .
NO -
Repair open in the wire between the engine oil level sensor and the under-hood fuse/relay box, then go to Step 22 .
  1. Measure voltage between engine oil level sensor 3P connector terminal No. 1 and body ground.
Is there battery voltage?
YES -
Go to Step 15 .
NO -
Go to Step 10 .
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Disconnect ECM connector No. 1 (96P).
  1. Check for continuity between ECM connector No. 1 terminal No. 83 and body ground.
Is there continuity?
YES -
Repair short in the wire between the engine oil level sensor and ECM connector No. 1 terminal No. 83, then go to Step 22 .
NO -
Go to Step 13 .
  1. Connect engine oil level sensor 3P connector terminal No. 1 to body ground with a jumper wire.
  1. Check for continuity between ECM connector No. 1 terminal No. 83 and body ground.
Is there continuity?
YES -
Go to Step 26 .
NO -
Repair open in the wire between the engine oil level sensor and ECM connector No. 1 terminal No. 83, then go to Step 22 .
  1. Measure voltage between engine oil level sensor 3P connector terminals No. 2 and No. 3.
Is there battery voltage?
YES -
Go to Step 20 .
NO -
Go to Step 16 .
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Disconnect ECM connector No. 1 (96P).
  1. Connect engine oil level sensor 3P connector terminal No. 2 to body ground with a jumper wire.
  1. Check for continuity between ECM connector No. 1 terminal No. 68 and body ground.
Is there continuity?
YES -
Go to Step 26 .
NO -
Repair open in the wire between the engine oil level sensor and ECM connector No. 1 terminal No. 68, then go to Step 22 .
  1. Turn the ignition switch OFF.
  1. Reconnect all connectors.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P250A 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. Reconnect all connectors.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P250A 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 recheck. 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.■