Help- Car is eating gas! P1151 code

Hi. I have a 1996 ford taurus GL. 3.0 OHV engine.

I've been having a problem with my car using way to much gas. The Service engine soon light came on and I pulled the code which is P1151. Ford said it was the upstream HO2 sensor bank 2. I replaced this sensor.... the one near the back of the engine(not the sensor right in the front).

I'm still getting the code( it came back afer 2 days). I had the neg battery cable disconnected after I replaced the sensor but I'm not sure how long I have to do this to erase he KAM(keep alive memory) to clear the code.

Has anybody else had this problem. Thanks.

- VGIZZO

I replaced the sensor in the exhaust manifold near the firewall in my 03 Vulcan and the code went away forever. A guy at Advance Auto told me this. Take the negative terminal loose when you park it for the night and let it sit until the engine is cool in the morning and hook it back up. Let it idle 10 minutes or so then drive it around town for 15 minutes then take it on the road and run it 50-60 mph for a few miles and you should be good to go.

Have you cleaned the mass flow air sensor - MAFS? CRC makes a product just for that but do not touch the wires with anything, just spray it like the directions on the can tell you. It has a lot to do with fuel metering and if it's dirty it can cause excessive gas burn along with other problems. Please read the link and educate yourself. http://autotechrepair.suite101.com/article.cfm/mass_air_flow_sensors
http://www.crcindustries.com/hd/content/prod_detail_print.aspx?PN=05110

Bank two should be the cylinder back towards the front of the car. It sounds like you changed the oxygen sensor for bank 1.

However, this code does not imply the oxygen sensor is bad, but rather the oxygen sensor is reading an overly lean condition. The overly lean condition could be caused by a faulty fuel pressure regulator, low fuel pressure, vacuum leak, leak after the MAF, stuck EGR valve, exhaust leaks, etc. Replacing the O2 sensor may not fix this code.

-Rod

Thanks Rod, good info there.
VGIZZO: Log on and use the search engine top menu on the right and punch in words realtive to what Ropd said and you should find plenty of threads on how to clean or replace this and that.