Just changed all o2 sensors then a hose off the inrake was dry rotted now what would be next

Question

F150 4.6 have code 1131 what should i be checking first i changed a couple couple hoses due to leaks

Answer 1

HI there

If the issue isn't resolved with the new O2 sensor, then it's possible you have an issue with a leaking intake manifold or possible fuel pressure problem. Here is a list of possible causes for the code.

P1131 FORD - Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 1

Read more: https://www.autocodes.com/p1131_ford.html