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Originally Posted by DRW1000
I cannot see why the replacing the drive belt should have started this.
I also can't see why someone would replace the water pump to try and correct a code they could not read. (especially since on some years it is a 6 hour procedure).
In any event you took the first step in trying to read the codes. Unfortunately if you cannot connect to the PCM to get the codes everything you do is hit and miss. I would ensure that you are getting proper voltage to the OBD11 port. My personal code reader will give me a link error if the 12 volts (and return) are not present. There is a fuse that controls this.
I assume you have a 96 or later van but I don't think you mentioned the year.
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1997-98 Ford Windstar LX. We were finally able to get a code and we replaced the mass air flow, the guy at the Kragens said to not clear the code, it would clear itself after 30 starts or 300 miles it didn't.
So we cleared it and we got another code PO171 meaning the left bank is running lean or there is a vac leak.
My brother who works on his own Fords believes it is still the mass air flow. I do remember reading in here that sometimes the mass air flow can over compenate and read wrong; correct me if I am wrong. One question I have is why would this light come on after an oil change???
We really need some help our lic. is due in early August and we do not have much money. Oweing still $7000.00 and engine light problems.
Please, please help us.