Engine misfires codes PO300,301,302,303,304 2002 Toyota Echo 4 cylinder 1.5L 62,00 miles engine light on

SOURCE: replace spark plugs with plat core plug

Platinum plugs are NOT recommended for the Echo. The heat ranges are different. Put the right plugs in it (buy them from a Toyota dealer) and see if your problem vanishes. I get this quite a bit, customers put in new plugs, and it runs worse than it did before they changed the plugs. Note that ALL Toyota engines have a specific plug engineered for each engine. Platinums do not work unless the engine was designed for it. Same with iridium and NO Toyota runs well on the "split fire" plugs. If the problem persidts, change the coils around, see if the misfire "moves" to a new location, and you get a DTC P-0300, P-0301 and P-0302. If so, your coil pack may have failed, BUT, do the plugs first.

SOURCE: 1999 toyota camry

Take it to autozone and have them to pull a code on it.It sounds like O-2 sincer

SOURCE: OBD2 read Misfire on 2,3 and 4 cylinders

p code will translate more of your problem what is p codes pls

SOURCE: 2000 toyota tundra #5 cylinder misfire

i think #5 is on driver side the front one....

SOURCE: 2000 Toyota 4 Runner, 3.4L, 6 Cylinder. Engine

look at the plug wires they are known to bust when old near the boot