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DTC Detection Logic

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
DTC CONSULT Diagnostic item is detected when... Reference
[P1820]  ENGINE SPEED SIG
  • Malfunction is detected in engine speed signal that is output from ECM through CAN communication.
  • Improper signal is input while driving.
 Refer to .
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