P0125 po171,Po301, PO303,PO304Toyota - tacoma

Question

1999 Toyota Tacoma displaying codes PO171, PO125,PO301, PO302, PO304 running very rough and the check engine light is flashing

Answer 1

check for intake leaks first near the intake, if there are no intake leaks I would replace the spark plugs if the problem is still there you can swap the ignition coils

 

p0125 I would replace the thermostat first, and check for leaks

 

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