My engine light came off I got those codes because my car was stalling because of the fuel lines not getting fuel and plus put in good gas like the middle one will help regulate the bad gas...i have ford focus 2005 zx3 and got the fuel sensor regulator out of junkyard and now it's fine no engine light...you must disconnect battery so while changing it will reset...then go to the top of your engine look for the fuel sensor regulator right in the middle unplug remove two screws pull up but put something underneath so the fuel won't go underneath replace then connect battery and done..
Recommend replace fuel rail pressure sensor, make sure connector and wiring are good, clear codes and recheck.
SOURCE: Ford Focus Engine Light
Start by getting either a mechanic or someone with an OBDII scanner to read the code so you know where to start. Lots of time a loose gas cap will cause a "Evap system small leak" code which illuminates the check engine light for a while. Other than that I can't help you much without knowing what code comes up.
SOURCE: ford focus, 2000 zx3 code p0455
your engine code means "big leak" in the evap control system, this system has alot of pieces, but you are looking for a vacuum leak most probably, look at your vacuum hoses, and refer to the vacuum diagram stuck under your hood for routing, see if you have a bad hose, or disconnected hose some where. these are small vacuum hoses that attach to the purge valve, air filter housing, and charcoal cannister. let me know what you find.
Testimonial: "Found the leak on the purge control valve. The hard plastic vacum line had holes worn in it from vibration. Thanks"
SOURCE: i have a 2001 ford focus and the check engine
You'll need to bring it to a garage (autozone, walmart, etc) to have it scanned for the exact code(s) to determine the cause of the light. the light can mean anything.
SOURCE: 2001 Ford Focus ZX3 rear window wiper and trunk release stop work
there is a recall on them i had the same issue it is caused by the wires being crushed when the trunk colses(im an ex ford mechanic, and ex owner of a focus)
SOURCE: Engine light on-trouble code P0452
EVAP fuel tank pressure sensor low output. It sounds like the charcoal -filled canister, it's near the gas tank in a cylinder shape.The canister may have cracks or a hose is leaking around the area and it will give a fault code of PO452. Are you smelling any odors or emission smell from the car?
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