Question about 1998 Ford Windstar
Code p0340 keeps coming up on my windstar. i've changed the cam sensor three times checked the voltage on the wiring and the car runs fine any ideas on what it could be
I'm pretty sure that sensor is a two wire, which produces an AC volt signal back to the computer. You would test it with an analog volt meter while the engine is cranking or running.
It could be a problem with the object the sensor is supposed to be "watching" such as the end of the cam shaft.
Posted on May 07, 2013
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Posted on Jan 02, 2017
You most likely have a 3.8 liter motor. You need to have a obd-2 diagnostic performed. Pep boys, Autozone, Aamco etc. can do this. (Ford also, but costly). If cam sensor failing, code will be stored in e.c.m, and data stream will prove out. The cam sensor failure is common on fords and they are usally available aftermarket (save a few dollars over O.E.M.) . If there is another problem, the diagnostic will help determine. Windstars are also prone to fuel pump failures and ignition switch problems.
Posted on Mar 14, 2009
I'd be looking at removing IAC valve, and cleaning it out with throttle body spray cleaner, and checking mounting gasket as well. Usually some success with cleaning it & spray ports it came out of, but if not you may need to replace it.
Posted on Oct 12, 2009
the input to the sensor must also be checked. this link provides some diagnostic procedures. diagnosis for camshaft and crankshaft sensors are similar, as stated in the article.
Posted on Jun 10, 2010
You have an Intake manifold leak or a leak in the fuelpressure regulator or fuel line. Most likely you need to check the Intake gasket with a water mist or Carb cleaner spray on the seams. Either one will produce a change in the RPM while the engine is running.
Also clear your computer, which I hope you did after changing all the parts you put on the van. When you get a Vacuum leak in the Intake, the fuel is not drawn into the cylinders properly and the ECU thinks the engine is running lean. The ECU orders more gas and the fuel regulator keeps dumping more gas in the engine.
Now you smell the excess gas, but the priority sensor overrides any secondary sensor saying its rich. The Evaporative Emissions system is flooded trying to reduce the fumes. In the end, you smell the excess gas.
Now both Autozone and Oreillys do free scans and their scanner may suggest more than what your scanner is showing. Check your Intake first, then scan it.
Posted on Oct 20, 2010
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