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2004 Nissan Quest Trouble Code P1148 and P1031

Trouble code P1148 & P1031 are coming up on my Nissan Quest, plus the check engine light is on. I replaced the Mass Air Flow sensor but the check engine light and trouble codes are still present. What should I do next.

Answer:

There is a Service Bulletin issued by Nissan regarding Trouble Code P1148 and P1031 for the Nissan Quest which we've attached a copy of below. The Service Bulletin requires the reprogramming of your Nissan Quest's ECM, to be performed by a certified Nissan technician. 2004 Nissan Quest Service Bulletin P1148 and P1031 Trouble Code P1148 refers to a faulty Heated Oxygen Sensor 1 Bank 1. Trouble Code P1031 refers to Faulty Air Fuel Ratio Sensor 1 Bank 1. If after the ECM reprogramming your Nissan Quest triggers the same trouble codes (P1148 and P1031), these components should be diagnosed. posted by SmogTips Support

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