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P2798 - OBD Trouble Code

OBD Code P2798 - Auxiliary Transmission Fluid Pump Control Circuit Low

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The trouble code P2798 can be described as Auxiliary Transmission Fluid Pump Control Circuit Low. The error code P2798 would start triggering when the PCM would detect some fault in auxiliary transmission fluid pump control circuit. One thing which you must keep in mind that its symptoms as well as causes would surely vary as it depends upon a number of things.

Learn More About OBD Error Code P2798

The P2798 trouble code would indicate that an auxiliary transmission fluid pump control circuit which is not as per the predetermined limit has been detected by the ECM. Now when this would occur, the fault code would be stored and there would be an illumination of the malfunction indicator light.

 

What causes this problem with the Auxiliary Transmission Fluid Pump Control Circuit Low?

 

  • Defaults in the electronic transmission fluid auxiliary pump
  • Electronic transmission fluid auxiliary pump harness might be opened or shorted
  • Some issues related to the drive motor generator power inverter control module failure
  • Unusable transmission fluid pump control relay

Replace/Repair These Parts To Fix OBD Code P2798

  1. Engine Control Module - Is your car engine light still staying ON after resetting or your car engine is turning off for no reason? Then these are some common symptoms indicating that your car engine control module is defective.
  2. Powertrain Control Module - The PCM works as the central computer system in an automobile’s mechanism. This auto part is in charge of all the constituents as well as the functions performed by them. Having such enormous importance in the operation of all the parts means that any defect in it will affect almost every aspect of a car.
  3. Transmission Fluid Pump Harness - The fluid pump harness can also be faulty causing transmission to underperform due to transmission slipping and harsh shift. Thus, check for harness faults and replace it now!
  4. Automatic Transmission Module - Faulty transmission module can cause problematic down shifts and upshifts, leading to stalling while accelerating or slowing down. This can also hamper many transmission system parts. Thus, replace it now!
  5. Electronic Control Unit - The ECU is a major component of your car's onboard computer. It's used to regulate many systems and subsystems in your car's engine, drive train and other major components. Visit us to buy best quality ECU online.
  6. Transmission Fluid Pump - The first indication of any transmission related problem will the illumination Check Engine Light. Other major symptoms indicating bad transmission fluid pump can be bad shifts, delayed response and fuel burning smell coming from under the hood. Thus, immediate replacement is advisable.
  7. Diagnostic Tools - Take the help of a professional mechanic to diagnose OBD code error. Use high grade diagnostic tools to resolve this issue. Buy new tools and equipment form us!

Symptoms Of OBD Error Code P2798

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P2798 code by mentioning some major symptoms below:

 

Common Symptoms

 

  • Illumination in the service engine soon light
  • A lot of transmission heat
  • Diminished shifting efficiency

How To Correct P2798 Auxiliary Transmission Fluid Pump Control Circuit Low

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P2798:

 

  • Repair or replace the quirky electronic transmission fluid auxiliary pump
  • You must fix the defective drive motor generator power inverter control module
  • It is essential to restore the flawed transmission fluid pump control relay
  • Recondition the non-functioning electronic transmission fluid auxiliary pump harness
  • It is necessary to perform proper service of the unsound powertrain control module 

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of automatic transmission fluid, torque converter, transmission solenoid, electronic pressure regulator, transmission shift solenoid, powertrain control module, multimeter, pcm, ecm, body control module component, powertrain control module, electronic control module, electronic transmission fluid auxiliary pump, electronic transmission fluid auxiliary pump harness, transmission fluid pump control relay, drive motor generator power inverter control module, transmission pump, pcm relay and many more. Now all your problems would vanish within no time.

Easy Diagnosis Of Engine Error OBD Code P2798

Here are some steps which you should follow in order to diagnose this fault code:

 

  • There are some models which use an electronic auxiliary transmission fluid pump to help regulate transmission fluid pressure by raising the flow of fluid throughout the transmission, transmission cooler, and torque converter.
  • There is an electronic controller which controls the pump by utilizing the system of wiring and relays. The powertrain control module would then utilize the input data from various transmission sensors to decide when the auxiliary transmission fluid pump must be turned on and turned off.
  • CAN stands for “controller area network.” The CAN represents a communication bus that would allow a number of microcontrollers to communicate with one another without the need for a host computer.
  • It is a message-based protocol initially designed for automotive use. The network of CAN bus is actually a complex conglomeration of wiring harnesses and connectors used as a pipeline of information which is shared between two or more automotive control modules. Every electrical function of the vehicle is virtually controlled by these controllers, with the powertrain control module being the primary controller.
  • Control modules receive input data from various sensors and emit output signals to system constituents and other control modules. If this proves to be a CAN bus associated situation, then it could prove very challenging to diagnose by an amateur technician. Unlike other diagnostic codes, this type of code can sometimes be best left to a professional simply because of the bulk of circuitry involved.
  • A technician which is experienced should use a specialized scanner (Autohex or Tech II) to determine the general area of the malfunction much more rapidly and easily than someone using a code reader as well as a digital volt ohmmeter. If you will disconnect and check every single pin of the CAN bus then it can consume a lot of time as well as money.
  • Also make sure to install some type of memory saving device, test the PCM and other controllers lose their memory and sometimes they might require reprogramming. A specialized diagnostic CAN scanner will depict pin values and control module operation without risking a meltdown. It can diagnose computer and issues related to circuitry correctly by monitoring automobile operation while the vehicle is being operated. If you want to diagnose this type of code using a digital volt ohmmeter, then it would entail probing thousands of circuits separately.
  • One probe which is misplaced could destroy expensive control modules and require that the vehicle be totally reprogrammed. At the most, you may attempt to perform a continuity test after all control modules are disconnected, and this could literally require 40-hours or more, based upon the automobile.
  • There are some applications are equipped with up to 18 separate control modules. If you choose to tackle this monumental task, then you must start with a careful visual inspection of all system circuitry, connectors, and fuses. Control module ground circuits should be inspected for continuity with battery ground. Generally, the faulty system grounds are reason behind the occurrence of these types of codes. An auxiliary ground cable can be supportive in diagnosing system ground discrepancies.
  • Engine and transmission ground cables, straps, and wires are sometimes left dangling once the repairs have been made. Search for loose or corroded electrical connectors that might rise the circuit resistance and cause these types of codes to be stored. Obtain a CAN bus system wiring diagram and/or pin out value chart, then use the digital volt ohmmeter to test continuity between individual controller connectors. You must compare your findings with the manufacturer’s referenced values and repair open or shorted circuits as per the need. It is more economical to restore the faulty wiring rather than attempting to remove it from the complex web of wiring harnesses.

 

Common Mistakes When Diagnosing The P2798 Code

 

  • There can be a failure in the auxiliary transmission pump
  • Defaults in the drive motor generator power inverter control module
  • Some issues related to the wiring

Other Diagnostic Codes Related To OBD Code P2798

P2796 - Auxiliary Transmission Fluid Pump Control Circuit/Open

P2797 - Auxiliary Transmission Fluid Pump Performance

P2799 - Auxiliary Transmission Fluid Pump Control Circuit High