P0643

P0643 Sensor Power Supply

On Board Diagnosis Logic
This self-diagnosis has the one trip detection logic.

P0643:

Fail-Safe Mode
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.






DTC Confirmation Procedure

NOTE: If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION
Before performing the following procedure, confirm that battery voltage is more than 8V at idle.

With SDT
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to [P0643 Sensor Power Supply].

With GST
Follow the procedure "With SDT" above.

Diagnosis Procedure

Step 1-2:

Step 2 (Continued)-4:

Step 4 (Continued)-7: