I have a 2000 f 150 4x4 5.4 Just redone the engine and now it throws a Bank 1 sensor 1 code I replaced the o2 sensor pass side 1st one Still the same. Not all the time it seems to mis or run rought ar low RPM then will run fine till the next day. THANKS Phil MN

 

What is the code number?

 

and what brand o2 sensor did you get?

 

I got the o2 sensor from FORD. I am not at home so i dont remember the code , maybe 0131 not sure till i get home But it said sensor1 bank1 Thanks Phil

 

P0131 Heated O2 Circuit Low Voltage (Bank 1, Sensor 1)

you did in fact change the front passenger side sensor right? did you drop the new sensor? check the connections. make sure theres no dirt or anything inside the connectors. check the harness to the o2 sensor.

 

yes i change the right one the code mite be 1131 dont remember will check when i get home

 

When I did mine I got that code a day or so later. Didnt have the conector clicked together tight.

 

P1131 Lack Of HO2S11 Switch - Sensor Indicates Lean

you gonna have to have the codes rechecked. if its the 1131 then check for any kind of vacuum leak.

 

code 0132 now it has a low rpm miss under power. check for vacume leaks none and i cleaned all sensors.could i have a bad coil or could i have burt a plug when its runs lean

 

possibly. how many miles? has it ever been tuned up? with what brand plugs? you can get a full set of 8 coils off ebay for 80 bucks(or less) from global or uneek. just type in dg508.
P0132 Heated O2 Sensor Circuit High Voltage (Bank 1, Sensor 1)
when the sensor puts out higher voltage(higher than .4v) then theres higher oxygen and in this case may be caused by the misfire possibly.

 

just redone engine 600 miles motocraft plugs, coils have 140000

 

ok did you use dielectric grease? sounds like a coil gone bad. you can get them on ebay. i'd pull the plugs as well to see which one it may have been and then torque them down to 30ftlbs to prevent any blowouts and then put the new coils in.

 

coils ckeck good, cleaned everthink went for a ride and it didnt act up but it ben on and off, When i was checking the coils i noticed some carbon on the hoses above the egr, cant find the leak you can hear a leak when its cold at about 2500 to 3500 RPM this truck is takeing up to much time need help Thanks Phil