G'day! I have an 2007 F150 Lariat 5.4 Litre V8.

I am wondering when facing code P0054 - I am looking at replacing the Bank 1 - Sensor 2 - Passenger side after the Cat. Correct? I checked the sensor and the wires are very worn and look to be in need of replacement. Does the sensor need to be at any specific temperature? There are videos on YouTube that designate 120F for replacement, but am not sure of their veracity.
Thanks!

 

@dragonwolf204,


I do not have personal experience with P0054 to draw from, and my documentation is on an '05 model F150, but I will try to offer something since you have gotten no response.


02 sensors are not prohibitively expensive, and the rear ones are easy to get to and I have changed mine. But I'm not very hip on throwing parts at one based on codes that can have multiple meanings. As you obviously already know, the case here is - :


- Faulty Heated Oxygen Sensor Bank 1 Sensor 2
- Heated Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted
- Heated Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection


You are probably correct. It's likely the heater element in the O2 sensor. But these present items that can be checked with a simple DVM. My '05 service manual should be accurate enough to provide some help on your '07.


1) The heater element on the O2 sensor should be the Blk/Wht AND the Vio/Wht. With it unplugged you should read (very low) static resistance between them if the heating element is good.



2) Power is supplied to the Heater via a common junction at a 15 amp fuse (#33) [located in fuse box in the Rt Kick Panel - center fuse of 3 fuses located between Two VERTICALY mounted relays (#201 & #202) at top left of fuse box]. With the 02 connected and KOEO, you should read battery voltage on the Vio/Wht. IF NOT, check the fuse and/or wiring .



3) The PCM turns the heater ON by taking the Blk/Wht wire to ground. With KOEO, the Blk/Wht should read at or near ground - (but definately below battery voltage), this is how the PCM determines if there's a circuit problem or too much current. If you read battery voltage on the Blk/Wht - check the Blk/Wht wire for continuity back to the PCM. On my schematic, it indicates it goes to Pin 1 on the Rt Hand plug on the PCM (don't trust that on yours - but it should still be Blk/Wht - or what ever other color it is at the O2 plug.


4) If you have an OBDII scanner that can read specific Perameter Ids, the status of all those circuits is presented at PID 1631 under a mode 02 request. The response is a bit oriented byte with the following meaning. My vehile reads Hex - '0F' - which would show all four low bits are true - '00001111'. I would guess yours should show Hex '2F' - '01001111' (dec 47) based on the DTC of 0054.


Cmd: 221631 response:6216310F___ HTR11____ 1631 b0 Bank 1 Upstream O2S Heater Control ON/OFF
________________________________ HTR12____ 1631 b1 Bank 1 Downstream O2S Heater Control ON/OFF
________________________________ HTR21____ 1631 b2 Bank 2 Upstream O2S Heater Control ON/OFF
________________________________ HTR22____ 1631 b3 Bank 2 Downstream O2S Heater Control ON/OFF
________________________________ HTR11F___ 1631 b4 Bank 1 Upstream O2S Heater Circuit Fault ON/OFF
________________________________ HTR12F___ 1631 b5 Bank 1 Downstream O2S Heater Circuit Fault ON/OFF
________________________________ HTR21F___ 1631 b6 Bank 2 Upstream O2S Heater Circuit Fault ON/OFF
________________________________ HTR22F___ 1631 b7 Bank 2 Downstream O2S Heater Circuit Fault ON/OFF


If this test failed, I have no idea what's going on.


At any rate, hope some of this helps.