My 2003 ford tauras had p1131 then a day later it got p0316 and p0302 what would be causing this?

It also shacks when it warms up.

Any vacuum or air leaks can cause P1131.

Possible causes:
-Water contamination in connector.
-Leaking vacuum actuators.
-Engine sealing (Intake and IAC).
-EGR system (valve).
-PCV system (hose and valve).
-Unmetered air leaks between throttle body and mass air flow (MAF) sensor assembly.

Lacking fuel. P1131 means the O2 sensor is hanging on the.1-.4 scale. If it doesn't reach.5 or higher it can't control the fuel mixture because it doesn't see the swing from lean to rich.

p0316 and p0302 are misfire codes

Hi Now having just seen the guy above has just informed you above is what could be wrong. The possibility that this could all be down to other major factors does not surprise most of us in the least when things get A OLD and B with Thousands of miles on them. And C being a FORD what do you expect. Designed to be good for 100k miles or 8 years as was the intention. Now only fit for the SCRAP YARD.