Maxima Forums - View Single Post - 5th Gen "I AM NEW HERE BUT HAVE A QUESTION" thread

madcheeku · 08-29-2006, 12:46 PM

I had the p0171 and p0172 codes sometime back and replaced the MAF myself. The MAF came with a note that the ECM should to be updated but I didn't do it since I had read of others not needing it.

About a week later the check engine light came back on and the codes are

P0138 - Heated Oxygen Sensor 2 Circuit High Voltage (Bank 1)
P0139 - Heated Oxygen Sensor 2 Circuit Slow Response (Bank 1)

Could this be due to the ECM not been updated? Should I update the ECM or change the o2 sensor?

The autozone person when checking the codes took out the check engine light and it hasn't come back since the last couple of days.

Thanks
(ps I had also posted this in one of the old MAF threads but I think this might be a better place to get some help.)

08-29-2006, 12:46 PM	#74
madcheeku Newbie - Just Registered Join Date: Dec 2005 iTrader: (0) Posts: 3	P0138 and P0139 codes are MAF replace I had the p0171 and p0172 codes sometime back and replaced the MAF myself. The MAF came with a note that the ECM should to be updated but I didn't do it since I had read of others not needing it. About a week later the check engine light came back on and the codes are P0138 - Heated Oxygen Sensor 2 Circuit High Voltage (Bank 1) P0139 - Heated Oxygen Sensor 2 Circuit Slow Response (Bank 1) Could this be due to the ECM not been updated? Should I update the ECM or change the o2 sensor? The autozone person when checking the codes took out the check engine light and it hasn't come back since the last couple of days. Thanks (ps I had also posted this in one of the old MAF threads but I think this might be a better place to get some help.)