How you can Test the Sentra Crank Position Sensor 1Shift the Sentra's transmission into park or initially gear (manual transmission) and turn off the engine. Set the parking brake and turn the ignition back for the "ON" position.
Don't commence the engine.2Connect an automotive scan tool towards the Sentra's diagnostic information port, positioned underneath the dash on the driver's side.3Turn on the scan tool and choose " Auto code scanner;ECM" from the key menu screen. Pick "Live Data" from the secondary menu screen.
Choose "CKP Sensor" from the "Live Data" screen.4Rotate the ignition switch forward and attempt to begin the engine. Look at the scan tool's screen although the engine is cranking; it need to display the cranking RPM of the engine Auto diagnostic tool. If it doesn't, then the crank position sensor is faulty and have to be replaced.
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