Question about 2001 Ford Windstar
We are having problem with the Windstar. We are not able to run over 20 miles per hour, and at 2100 RPM the idle keep going up but the car loss strength it is like the transmission goes to neutral. The first test showed codes PO402, PO732, PO733, PO171, and PO174 so I replaced DPFE/EGR Valve Presure Sensor, and Neutral Safety Switch I went to the garage, and the mechanic told me that the transmission is fried so just to verify I bought the OBD II to run the diagnostic tests, now the test is showing codes PO340 (Camshaft Position Sensor A - Bank 1 Circuit Malfuntion) PO171 (System to Lean, Bank 1), and PO174 (System to Lean, Bank 2). I will be looking for leaks but in the mean time I would like to know what are the symptoms of a bad Camshaft Position Sensor. Please reply to: firstname.lastname@example.org
Symptoms of a faulty Camshaft Position Sensor can include hard starting (or no starting), rough running/misfiring and/or loss of power.
Code 340 COULD be caused solely by a faulty Camshaft Position Sensor. However, this code refers to the entire circuit. So, replacing the sensor may not fix the issue. The problem could lie in any part of the circuit - the sensor itself, the wiring, or the PCM.
Codes 171 and 174 typically appear together. They are caused by the 02 sensors reading too much air (lean) in the exhaust. In most cases, simply cleaning the MAF sensor does the trick. I typically take it off and spray it with electronics or brake cleaner. Just make sure it dries before reinstalling. If this doesn't eliminate the codes, inspect all vacuum and PCV hoses, check for a dirty fuel filter and ensure the furl pressure is within limits.
For clarification, the first trip to the shop your car showed codes 402, 732, 733, 171 and 174. After changing the DPFE/EGR, did ALL those codes go away and now only codes 340, 171 and 174 exist? Or do you have the second set of codes in addition to the first codes?
Posted on Jan 15, 2009
I have a 1998 Ford windstar a friend did a check and came up with these codes could you tell me what i need to do now. Some time the car feels like it gonna stall but hasn't so far and when going up a hill i loose power any idea's Thanks Crystal 340 CPS 133 B1S102300174 B2
Posted on Jan 07, 2012
Andy7777 did you fix it yet if so what was it.I believe its the speed sensor. I have the same problem.
Posted on Apr 20, 2009
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