Question about Ford Ranger

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I have a 1999 Ford Ranger pickup (supercab) 4.0 liter, automatic transmission. The truck is running extremely rough, as if it has a faulty plug or wire. When I scanned it, I got a bunch of codes indicating that the O2 sensors were shot. After replacing them, it did not fix the issue. However, most of my trouble codes are now gone. I'm down to two codes, which are: P1780 - Trans ctr sw circuit out of range P1000 - this one I'm not too worried about, I believe it will clear itself in time. What could be causing the P1780 code and are the symptoms I'm experiencing indicitive of the issue?

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  • Chris Hall
    Chris Hall Feb 17, 2009

    Several were right on track regarding the codes and how to fix them. Of course, these were unrelated to the vehicle running roughly (which obviously was my main concern). Chuck's suggestion, as well as some new plugs (one appeared to have been fouled) fixed the problem and it now funs as good as new. Thanks again Chuck!

  • Chris Hall
    Chris Hall Feb 17, 2009

    Several were right on track regarding the codes and how to fix them. Of course, these were unrelated to the vehicle running roughly (which obviously was my main concern). Chuck's suggestion, as well as some new plugs (one appeared to have been fouled) fixed the problem and it now funs as good as new. Thanks again Chuck!

  • Chris Hall
    Chris Hall Feb 17, 2009

    Several were right on track regarding the codes and how to fix them. Of course, these were unrelated to the vehicle running roughly (which obviously was my main concern). Chuck's suggestion, as well as some new plugs (one appeared to have been fouled) fixed the problem and it now funs as good as new. Thanks again Chuck!

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6 Answers

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  • 250 Answers

Its the problem of loose connecting wires.open the streelig area and check out for the cut in the wirrings.or loose connectivity.check it properly with meter or get it checked at a diagnosis center properly. or at local car garage.

Posted on Feb 16, 2009

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P1000 means that the monitors have not completed.These are programs kinda like say an anti virus or spyware scan that must be completed,They include like EGR monitor,O2 monitor,EVAP monitor,etc. When all these monitors complete with out any concerns detected then this code will clear. You will have to have more 1/4 tank of fuel but less than 3/4,you will have to have a 6 hour cold soak then start engine and drive about 25 miles with at least 2 minutes of speeds at 55-60 mph and 2 minutes of 40-45 mph,do not turn key off before you complete this or you will have to go thru another 6 hour cold soak.
The P1780 is the OD cancel switch,did you have OD turned off during self test? If so this would set this code. If not then make sure it works when you press the button. If it doesn't work then access the steering column by removing the plastic covers and see the connector with a VT/OG and TN/WH wires and disconnect the connector take an ohm meter and on the switch side make sure you have continuity then press button and see if it has no continuity. If it does have continuity in one position it is bad.

Posted on Feb 16, 2009

  • Chuck Martin
    Chuck Martin Feb 16, 2009

    Sorry brother had a brain freeze on this.During the key on engine running self test you must turn od switch off then on during the test or this code sets.

  • Chuck Martin
    Chuck Martin Feb 16, 2009

    As far as the running rough there is a tsb out that maybe your concern 00-5-4. The wiring harness may be caused by an electrical wiring harness that is being chafed by the under carriage around/under the driver's seat area.

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Hello, P1780 is a TCS malfunction. The transmission symptom is"OD"not canceled with switch during KOER {key on engine running} test. The P1000 is a drive cycle test and should go away after the running problems. I don't see how either of these codes could make one run bad. You need to address the running problem first.
Thanks Gator241

Posted on Feb 16, 2009

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  • Master
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Hi!

This code means Transmission Control Switch Out of Self-Test Range. This code is caused whem the scan tool is connected to the truck to retrieve the codes. You need to press the overdrive cancel switch during the engine running test or you will get a code P1780.

Posted on Feb 16, 2009

  • 3 more comments 
  • Rylee Smith
    Rylee Smith Feb 16, 2009

    This code occurs when you fail a selftest i.e when self test is not performed correctly. And, to remove it run the test again and try pushing the switch and brake pedal during the test.



    Now, you will not face this code again

  • Rylee Smith
    Rylee Smith Feb 16, 2009

    And P100 code also comes when Monitor Testing is Incomplete. So, to resolve this issue also you need to perform the test correctly.



    During the KOER (Key on, engine running) portion of an EEC test, you're to actuate certain inputs, usually the Brake On/Off switch, Transmission Control Switch, and Power Steering Pressure switch switches to verify that an output is being sent by those respective circuits.

  • Rylee Smith
    Rylee Smith Feb 16, 2009

    Please ask for any further clarifications.



    Please rate this solution accordingly if you have found it helpful.



    Thanks

    Rylee

  • Rylee Smith
    Rylee Smith Feb 16, 2009

    To avoid this code you also have to turn the steeringwheel a bit during the test.



    This how you have to do this Cycle Transmission Control switch on/off, depress brake pedal and release, turn steering wheel 1/4 turn in either direction and release.

  • Rylee Smith
    Rylee Smith Feb 16, 2009

    This how you have to do this Cycle Transmission Control switch on/off, depress brake pedal and release, turn steering wheel 1/4 turn in either direction and release.



    Please ask for any further clarifications.


    Thanks

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  • 326 Answers

Transmission control module TCM requested MIL illumination .
just check it out.

Posted on Feb 16, 2009

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  • 5,158 Answers

I'll have a look at the manual shortly

Posted on Feb 16, 2009

  • Roberta Smith
    Roberta Smith Feb 16, 2009

    P1780 PNP Switch Malfunction






    as far as running rough... pull each spark plug seperately from the coil pack and note if the engine changes idle... replace that wire and move on to the next... if you note a change you have likely found the problem

  • Roberta Smith
    Roberta Smith Feb 16, 2009

    p1000 shouldn't even set off the light... be that as it may... what colour is the exhaust coming out of the tailpipe ?



    Robert

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