Check Component

Inspect knock sensor. See SYSTEM/COMPONENT TESTS article in the ENGINE PERFORMANCE section. Replace knock sensor if necessary and perform FINAL CHECK  . If knock sensor is okay, repair ECM pin terminals and/or wiring harness connector.

Fig 1: Locating Knock Sensor Harness Connector (Sentra)

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: DTC 34, Checking Input Signal Circuit (Sentra)

Courtesy of NISSAN MOTOR CO., U.S.A.