{"nhtsa_id":621950,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-10-05","date":"2001-08-07","document_id":"ITB01045","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":null,"summary":"SOME VEHICLES MAY EXHIBIT A MALFUNCTION INDICATOR LAMP (MIL) ON WITH REAR OXYGEN SENSOR DIAGNOSTIC TROUBLE CODES P0138, P0139, P0140, P0158, P0159, AND P0160 STORED IN THE ENGINE CONTROL MODULE (ECM). *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/621950","components":[],"codes":["P0138","P0139","P0140","P0158","P0159","P0160"],"topics":[],"vehicles":[{"make":"INFINITI","model":"QX4","year_from":1999,"year_to":2000,"match":"exact","vehicle_ids":["1999_infiniti_qx4","2000_infiniti_qx4"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}