Question about 2001 Ford F250 Super Duty Super Cab
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Posted on Jan 02, 2017
SOURCE: I have a 2001 f350
CODE PO720 - OUTPUT SPEED SENSOR MALFUNCTION / CODE PO732 - INCORRECT GEAR RATIO SECOND GEAR / CODE PO781 - FIRST TO SECOND SHIFT MALFUNCTION / CODE POP1247 - TURBOCHARGER BOOST PRESSURE LOW CONDITION. COULD NOT FIND CODE PO1316. LOOK ALL PROBLEMS COULD BECAUSED BY CODE PO720 FAULTY OUTPUT SPEED SENSOR IT CONTROLS TRANSMISSION SHIFTS.
Posted on Aug 18, 2010
Could be the Camshaft Position Sensor (CPS) again. Did you have it replaced by the dealer on the Ford unlimited recall ? It's easy to check...get under the front end of the truck and look up by the harmonic balancer (sits behind the main pulley) on the passenger side and you'll see a sensor (could be brown but I believe that one was the recall color, most likely it will be black) with two wires coming out. Is it secured onto it's mounting bracket ? Is the wiring plug snug into it's socket ? If so...it could very well be a defective CPS. It's not unusual. Any possibility your batteries drained to a point where it's not cranking out enough ? Also consider, you may have originally had a different issue besides the CPS.
Posted on Aug 24, 2009
The IAC (idle air control) may be stuck from dirt or malfunctioning.It's located in the intake near the throttle body.Remove it clean with carb cleaner and reinstall
Posted on Nov 23, 2009
Testimonial: "Thank you for response. Actually had IAC off and was clean inside. Resistance within range 9 ohms but voltage signal at 12.5 V rather than 10.5 V"
The first thing i would check is the Glow Plug Relay. Depending on your engine there should be (2 solenoids, or just one) sitting on the top front a little to the right of center. (right bank of engine that is) If you have 2 of them one should be smaller and it is the one furthest to the rear of the engine. It controls power to your glow plugs for cold start up. When you turn the key to the on position the 2 larger wires should both have power. When the ignition is off only one wire should have power. Check this if you do both these tests and only one wire has power with key on or off then you need to make sure that the key switch is sending power to the solenoid. Do this by checking the smaller wire with key off. It should not have power and then with key on it should have power. If this is good and test one is bad then the relay is bad. Note This is not true for the larger realy that sits furthest foward on the engine. The bigger one. This test will not work for it but it controls your intake heater. On another note: This is a timed circut and will "kick out" after about 1-2 minutes. In otherwords it does not stay on all the time that key switch is on it will for for about 1-2 minutes then shut off! Next would be your injectors are getting weak or bad and even your HPOP could be getting weak. or glow plugs in engine are out, In otherwords there are alot of possibilities causing your problems If you are getting a misfire code for your injectors then you may have some weak or inop injectors. Any way this will give you a pretty easy test for the most common failure which is the Glow plug relay. About 35-40 bucks at your local auto parts house.
Posted on Feb 03, 2010
A code P0303 may mean that one or more of the following has happened:
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
A. P0401 "Exhaust Gas Recirculation Flow Insufficient Detected" that there is not enough exhaust gas being admitted to the engine.
There are a number of things you can check, and others you need a scan tool to check.
What you can do is check for vacuum to the EGR valve. You can remove the EGR valve and see if it is stuck closed. Test it with a hand vacuum pump and see if it opens smoothly. Check the EGR valve orifice and make sure it is free and clear. Check and clean the EGR passages in the going to and from the EGR valve.
If this checks out, then the Differential Pressure Feedback EGR system will need to be scanned to check the EGR sensors and switches
A code P0301 may mean that one or more of the following has happened:
Posted on Feb 16, 2010
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