Question about 1999 Dodge Durango

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While driving down the road at 65 miles an hour with cruse set, the rpms go way up and its like I have no gears. When taking off at stop light its like I'm in third gear. The check engine light is on and the codes read P1762 P1763.

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  • scmslaugh Jul 24, 2009

    We just changed the govenor pressure sensor and transducer and the volts. Less than one hundred and fifty miles ago.

  • scmslaugh Jul 25, 2009

    What is the pcm? We are replacing the cables to the battery and the relay box, they looked real bad.



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  • Master
  • 6,784 Answers

HI, first you should check the fluid level asap. make sure your fluid is at a proper level. if the fluid level is ok, check the Transmission shift linkage. you may have some Incorrect Kick down Cable Adjustments. If all is well here, move down to the code descriptions below.

Concerning the codes, both codes are referring to a faulty Governor pressure sensor and solenoid. These issues will affect the performance of the Auto Transmission. It will disrupt the downshifting at acceleration. I must advise to check the PCM for proper voltage as well. these codes will be sent if the PCM is not providing the proper voltage to this sensor and solenoid. The proper voltage is no less than 5volts. if the voltage at the Gov. pressure solenoid is lower than 5 volts, this will confirm a PCM failure. If the voltage is sufficient, replace the Governor pressure solenoid/sensor, and transducer. this will require you to drain the trans and, pull the pan. replace the pan gasket and filter upon reassembly.

If you are uncomfortable with doing this repair, i recommend taking it in to the dealership asap.

Posted on Jul 24, 2009

  • 2 more comments 
  • Michael Masters
    Michael Masters Jul 24, 2009

    i see. this model has many issue with these parts. this A/T has numerous recalls as well. These codes represent the failed parts you have just recently replaced unfortunately. As stated above, i would test the PCM outbound voltage to the sensor and solenoid. this could be a PCM issue but, testing is needed to confirm.

    It is not uncommon for the parts to have failed once again. this year model has many issue logged that concerns the Auto transmissions durability.

  • Michael Masters
    Michael Masters Jul 25, 2009

    Well, basiclly The Powertrain Control Module (PCM) performs many functions on your vehicle. The module accepts information from various engine sensors and computes the required fuel flow rate necessary to maintain the correct amount of air/fuel ratio throughout the entire engine operational range.

    Based on the information that is received and programmed into the PCM's memory, the PCM generates output signals to control relays, actuators and solenoids. The PCM also sends out a command to the fuel injectors that meters the appropriate quantity of fuel. The module automatically senses and compensates for any changes in altitude when driving your vehicle.

    The PCM constantly monitors the input information, processes this information from various sensors, and generates output commands to the various systems that affect vehicle performance.

    The PCM monitors engine operations and environmental conditions (ambient temperature, barometric pressure, etc.) needed to calculate the fuel delivery time (pulse width/injector on-time) of the fuel injector. The fuel pulse may be modified by the PCM to account for special operating conditions, such as cranking, cold starting, altitude, acceleration, and deceleration.

    The ability of the PCM to recognize and adjust for vehicle variations (engine transmission, vehicle weight, axle ratio, etc.) is provided by a removable calibration unit , referred to as a PROM (Programmable Read Only Memory) that is programmed to tailor the PCM for the particular vehicle. There is a specific PCM/PROM combination for each specific vehicle, and the combination's are not interchangeable with those of other vehicles.

    The PCM also performs the diagnostic function of the system. It can recognize operational problems, alert the driver through the SERVICE ENGINE SOON light, and store a code or codes, which identify the problem areas to aid the technician in making repairs.

    Concerning those bad cables. this will affect the current flow to the PCM. replacing them is a great idea.

  • Michael Masters
    Michael Masters Jul 25, 2009

    Replacing the relay box is also great. you are on the right track here.

  • Michael Masters
    Michael Masters Jul 25, 2009

    This device(PCM), also controls the Governor pressure solenoid and sensor. If the sensor circuit is low, this will lead ot either an issue with the voltage sent by the PCM or, the sensor and GOV itself. This device actually controls all functions of the solenoid base in your transmission. it uses the TPS and temperature sensor as well to adjust shift patterns during travel. it also uses the MAP, Crank sensor,Camshaft sensor,IAC valve etc....



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