99 5.4L o2sensors

[CCTD shop]

Hey everyone, I'm new here but have been the field for a lot of years, 1999 expedition 5.4L, three months ago I replaced all the coils and tuned up, then I replaced all four of the o2 sensors a month, now I have codes po151 and p1151. Has anyone had problems with wiring issues on o2 sensors ?

 

[Bedrck47]

Welcome to the Forum

 

[Bedrck47]

Trace out your wiring to the sensors Pay attention to any wires that are close to the exhaust manifolds and look for any burnt wiring

Check all connectors for any signs of corrosion and make sure connectors are clean and tight

 

[MikeA]

CCTD,
This may help you,
https://www.obd-codes.com/p0151
https://www.obd-codes.com/p1151-ford

Should get you pointed in the right dirrection for a fix

 

[docraymund]

Check for intermittent breaks from the sensor to the ecu. It is very probable that you have a wiring issue.