sinclairgraphics1

So to make a long story short, I had to have my old 2004 5.4 Triton motor with 154k replaced a couple weeks ago. I've only owned the truck for not quite a year and had many issues but you can find all that in my other posts.

Anyway, so I just had the code P0198 Temperature(EOT)Sensor Circuit High come on today. After doing some research I learned the oil temperature sensor could be faulty. However, I looked at the oil filter that was installed when the motor was changed and it's an Autolite. The shop told me they used a Motorcraft one but they lied to me. I also learned that if they didn't put in the Ford 5w20 oil this could trip the sensor as well. When I called them about this they said no, that would not be it. The sensor is likely bad. I checked out the sensor and the wiring and everything looks fine. So what would be more likely to cause this?? The wrong oil or a bad sensor? Both maybe?

alsatropine

iTrader: (2)

I would lean towards the sensor first..

sinclairgraphics1

I stopped at O'reily Auto Parts on the way home and they did not have the part. Said its probably a dealer part. Does anyone know or have that part number?

On another note, I had my brakes checked and was told they were fine at the shop. But, the pedal is getting "squishy" as hell and its harder to come to a complete stop. When I keep pressing the pedal and it just will keep going in to the floor. I have also noticed more brake dust on the wheels. The pads and rotors look fine.

Could it be the master cylinder or brake booster maybe?

alsatropine

iTrader: (2)

Have you physically looked at the sensor for any chaffed wiring ? Have you tried clearing the code to make it reappear?

sinclairgraphics1

Yes, if it's the sensor that's on the side towards the bottom of the oil pan that's the one I checked. Everything looks good. Now the truck is running poorly, hesitating big time. Could the sensor really be doing all this? I need to get it fixed asap. A brand new motor should not be running so ****ty.