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1999 Ford Taurus, Engin light on, OBD II Code, P1744 Diagnostic Report‏: EPC Solenoid Circuit Malfunction car is running normal, what should I do next?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Molson02536
  • 3854 Answers

SOURCE: p1744 enginge code tcc solenoid circuit

DTC P1744 is "TCC - Excessive Slip Detected During Full TCC Engagement". Which means that the Torque Converter Clutch (TCC) is disengaged or the EPC pressure is at the minimum.

The most likely cause is a sticking or bad TCC solenoid inside the transmission. You can check the connector at the transmission to make sure it is clean and tight and that it is not damaged in any way.

If the TCC and wiring is okay, then pressure testing of the transmission will need to be done.

A new torque converter from Ford is about $265.00 and about 4 hours labor. Throw in a $40.00 TCC solenoid and I don't think it'll be more than $700.00 at worst.

If the pressure test is good then it's just going to be the $40.00 tcc solenoid and the cost of the transmission oil and filter changed which should be around $150.00

Good luck and hope it's just a loose wire harness to the solenoid which would cost $0.00 and just your time to locate the break in the wire. The other thing to, is to add a transmission fluid additive that would restore the clutch pack in the transmission and Torque Converter.

Posted on Nov 17, 2009

Testimonial: "thanks a lot very helpful and detailed explanation"

  • 23 Answers

SOURCE: transmission problem

Its located inside the side pan. 4 bolts that need to be retorqued and a screen filter, replace it too.

Check fluid level too, if system gets a little low it wont move trans.

Posted on Aug 26, 2008

  • 14036 Answers

SOURCE: OBD malfunction indicator light status on stored

CODE PO325 - KNOCK SENSOR. CODE PO335 -CRANK SHAFT POSITION SENSOR. CODE PO336 - I DID NOT SEE CODE PO336.

Posted on Aug 28, 2009

  • 43 Answers

SOURCE: 1997 mazda 626 Over Drive off light flashes and

OBDll 1744 says torque pressure control system mechanically stuck in off position.

Posted on Mar 14, 2010

ZJLimited
  • 17970 Answers

SOURCE: OBD code P0746. Where is the Pressure Control

P0746 Pressure Control Solenoid Performance or Stuck Off
A transmission solenoid is an electro-hydraulic valve that controls fluid flow into and throughout an automatic transmission. Solenoids can be normally open or normally closed. They operate via a voltage or current supplied via the transmission computer or controller. Transmission solenoids are usually installed in a Transmission Valve body, Transmission Control Unit, Transmission Control Module or inside the Transmission and it helps regulate the pressure from the trans fluid pump.


P0446 Evaporative Emmission Control System Vent Control Circuit Malfunction

What does that mean?
Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test.

Symptoms
There will be no obvious symptoms to driver, other than MIL illumination.

Causes
A code P0446 could mean one or more of the following has happened:
* Faulty vent valve
* Open, short or excessive resistance on Vent valve control circuit
* Blockage of vent valve
* Bad PCM

Possible Solutions
With a P0446 OBD-II trouble code, here are some things to try:
* Replace Vent valve
* Repair open, short, or resistance problem in control circuit
* Repair open, or short, or resistance problem in power circuit
* Replace PCM


Hope this help (remember rated this post).

Posted on May 12, 2010

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I hope this helps and is what your looking for... good luck

http://www.fordobdcode.com/p0715-ford

Ford P0715 OBD-II Trouble Code Definition:
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What does the code p1744 mean on a 97 ford taurus sho


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That code is a transmission code for the Torque converter being stuck in the off Position.

P1744 Torque Converter Clutch System Stuck in Off Position

You will need to have the transmission checked. Due to the cost of transmission repairs, if you have a warranty that will give you the option of returning the vehicle and getting your money back I would do that. It is likely they were aware of the transmission problem and simply cleared the code thinking it would make it past the warranty and it didn't. Here is the link to the codes page I use for inforamtion on this:

http://www.obd-codes.com/trouble_codes/ford/

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Overdrive light flashing No lock up


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Here are some codes for your truck. :?) DRRXR
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    Explorer, 2000; 4.0 EFI: Engine runs fine in neutral & responds well when accelerator is depressed; shift to reverse or drive & engine runs very rough....with no power whatsoever. Scanned...


    P1747 * EPC, wiring, PCM EPC solenoid circuit failure, shorted circuit or output driver Voltage through EPC solenoid is checked. An error will be noted if tolerance is exceeded. Short circuit causes minimum EPC pressure (minimum capacity) and limits engine torque (alternate firm). Go To Pinpoint Test
    The EPC solenoid is shorted or the electrical circuit (wiring) or the transistor (driver) inside the computer is fried. do you know how to test a computer controlled circuit ?
    How to test computer transistor driver without scan tool

    Do you know how to find the circuit in question ?

    And you are correct about these two codes as being not related . Do you know what evaporative emission system is ?


    Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

    The Evaporative Emission Control System (EVAP) is used to prevent gasoline vapors from escaping into the atmosphere from the fuel tank and fuel system. The EVAP system usually requires no maintenance, but faults can turn on the Check Engine light and prevent a vehicle from passing an OBD II plug-in emissions test.
    EVAP Evaporative Emission Control System - AA1Car.com
    http://www.bbbind.com/free_tsb.html you can find free wiring diagrams here . Do you know how to use a wiring diagram ?

    P1451 - EVAP Control System Canister Vent Solenoid Circuit Malfunction Monitors the canister vent (CV) solenoid circuit for an electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified canister vent duty cycle by PCM command.
    • VPWR circuit open
    • CV solenoid circuit shorted to PWR GND or CHASSIS GND
    • Damaged CV solenoid
    • CV solenoid circuit open
    • CV solenoid circuit shorted to VPWR
    • Damaged PCM
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    Do you know how to use a DVOM - digital volt ohm meter ?
    Do you know that P1747 (electronic press control solenoid short circuit) Is a transmission problem . This solenoid controls the fluid pressure .

    May 10, 2017 | Ford Explorer Cars & Trucks

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