Check MAF Sensor

Inspect MAF sensor. See SYSTEM/COMPONENT TESTS article in the ENGINE PERFORMANCE section. Replace MAF sensor if necessary and perform FINAL CHECK in this article. If MAF sensor is okay, check ECM wiring harness connector and repair or replace as necessary.

Fig 1: Locating MAF Sensor Harness Connector (Sentra)

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

Fig 2: DTC 12, Checking Power Supply (Sentra)

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

Fig 3: DTC 12, Checking Ground Circuit (Sentra)

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

Fig 4: DTC 12, Checking Input Signal Circuit (Sentra)

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