I have a 1996 2.0 SOHC, I get a constant PO171 code. Everything has been changed, including the engine and I still get the code!! I even changed the oil pressure sensor and cleaned the wiring to the ECU. I found engine oil in the ECU plug and cleaned that out. The problem went away for 15 miles and has returned...again and is constant.WTF?? I am wondering if it might be the ECU? HELP!!!! I need to know where to start. Thanks in advance.
You cannot have even the slightest exhaust leak between the engine and the oxygen sensors or you will see this code.Also make sure the air flow sensor is clean.
SOURCE: don't know what system lean bank means.
hi it means you have a lean fuel/air ratio on the cylinders on that side of your engine look for air leaks [hoses gaskets loose manifold bolts etc yates210456
SOURCE: engine code on a neon
it sounds like you have a fuel issue. you should check for proper fuel pressure. its should be 48 PSI.
if its not, it could be a clogged fuel filter, a malfunctioning fuel pressure regulator, clogged fuel pump strainer, or even a bent, kinked fuel line.
if the fuel pressure is correct, its most likely a faulty fuel injector.
by the way, you car doesn't have a mass airflow sensor, it has a MAP sensor
SOURCE: rough idle and stalling
if you have a check engine code on,scan it will point you at problem area,if notand if timing belt is pass due may be wearing out and jumped a few knotches,i would inspect it anyway
SOURCE: engine dies sitting at lights and hesitates on
Take a look at the idle air control (IAC) motor and make sure that is working correctly.
SOURCE: 98 Ply Grand Voyager, 1.4K miles with recurring P0305 code.
You say you changed the cap and rotor so I'm assuming the van has a 3.0L? Possible injector problem on cylinder #5, swap injector with cylinder 1 or 3 and see if miss/dtc moves to that cylinder. You also could have a vaccum leak, although they usually won't come and go. Does the vehicle have a consistent miss or do you just have a check engine light?
Testimonial: "Yes I have a 3.0L. I will swap out injector #5 with another cylinder. I can?t find any vacuum leak and was thinking on putting in a new EGR valve. The vehicle seems to have a consistent miss. The check engine light is on again. I started with error code P0300 and P0305. After I replaced the parts listed above the error codes went away, (no check engine light). Next day P0305 came back. "
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