Re: 2000 ford escort zct 2.0 L DHC
P0171 Possible for major vacuum leaks, restricted fuel ﬁlter, low fuel pressure, low fuel volume and low engine compression.
P0340 Camshaft Position (CMP) sensor circuit malfunction.
P1381 Can be caused by a stuck Variable Camshaft Timing valve that is stuck closed, low engine oil pressure or a camshaft that is not timed properly. Normal solenoid resistance is 3.0-6.0 Ω.
Have you cleared the codes and then run it to see which ones come back? Has the fuel filter been changed? The timing belt could have jumped timing.