Search results

My cel is on. Have the P0420 code. Replaced the Bank 1, sensor 1 02 sensor in November. Which 02 sensor causes the cel light to come on? The upstream or the down stream 02 sensor? I bought 4 of the 02 extenders to try to fool the computer. So I can pass emissions testing. Need to know which 02...

I have a 2010 Pro4X Xterra. It didn't pass the emissions test. I checked the scan tool code P0420. The Xterra is running great. I've seen on you tube that you can use Stainless Steel 02 O2 Oxygen Sensor Extension Spacer CEL Fix - M18x1.5. Has anyone done that to their Xterra? I changed out the...

I did a hard reset on the ecu. CEL is off and has stayed off since Saturday. I ran the scan tool again tonight. Now it's showing P0420. But the cel is off. I have to have my vehicle go through the emissions test by the end of November. So I am stumped on what to do

Yes I did. Drove for a while cel stayed off. cel came back on this morning after driving abot 20 miles. I'm stumped. Guess I'll have to take my vehicle to a mechanic

2010 Xterra 156,550 miles on it. I had to replace the Bank 1 Sensor 1 02 sensor. The cel is still after put in the new 02 sensor. So I ran a scan it showed P0171. I haven't drove but around 15 miles to see if the gas mileage went up. It was 8 mpg, now 21 mpg with the new sensor. I don't know...