[Kevin]

So i've already made one thread, but now i'm getting different codes after replaceing the front two O2 sensors and putting the stock mass air meter on. Previous thread here: http://moddedmustangs.com/forums/tro...es-vt1018.html



Now i'm getting P0153 - O2 ssensor circuit slow response (bank 2 sensor 1). Which I'm told is telling my is my passenger side front O2 sensor, well i just replaced that.


Next code is p0171 - system to lean bank 1. I'm assuming that the first code tripped this second one, but i'm not sure on that.

Do you guys have any idea's on what I should do to get this thing to go off and stay off. It's hard to sell a car when the service engine light is on...

Thanks, Kevin

[mdvaldosta]

Bank 2 is drivers side, not passenger. At first glance it sounds like a bad 02 sensor(s), but considering their both throwing a light it could be a mass air meter (dirty maybe?). I'd start with making sure the mass air meter is clean and the throttle position sensor is within range, then clear the codes and see if it comes back.

[Kevin]

Originally Posted by mdvaldosta Bank 2 is drivers side, not passenger. At first glance it sounds like a bad 02 sensor(s), but considering their both throwing a light it could be a mass air meter (dirty maybe?). I'd start with making sure the mass air meter is clean and the throttle position sensor is within range, then clear the codes and see if it comes back.

i've replaced my mam, so i cant see it being that. How do i check to see if the thottle position sensor is in range?

[Kevin]

any ohter ideas?

[99mustang232]

did you replace the right sensor?

[Twist 2 Go]

if both upstream sensors have been replaced, I'd look for a vacuum leak. Start with the pcv hose and it's elbows

[xx9gt6xx]

I'm running the P0153 code as well. When it came on the first time I replaced the driver's side o2 sensor and it shut it off for about 100 miles. Now the light's back on w/ the same code. So I'm in the same boat and I need help too. Anyone?