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Guide To P2779 OBD Error Code Solutions

OBD Code P2779 - Downshift Switch Circuit Range/Performance

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Has your car’s downshifting switch stopped working? Is the car transmission slipping? Are you experiencing lack of acceleration and poor gear shifts? All these are indications of transmission system problems in relation to the downshift switch circuit leading to OBD code P2779 getting stored in the powertrain control module (PCM).

Learn More About OBD Error Code P2779

The trouble code P2779 can be explicated as Downshift Switch Circuit Range/Performance Issue. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code. This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made from 1996 up to present. It’s also more common among Audi, Citroen, Chevrolet, Ford, Hyundai, Nissan, Peugeot, and Volkswagen vehicles. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model, powertrain configuration type, to another.

 

What causes this problem with the Downshift Switch Circuit Range/Performance?

 

  • There can be inoperative downshift switch
  • Some issues related to the electrical connection with the downshift switch
  • Some issues related to the open or shorted harness, wiring, or connectors for the downshift switch
  • Liquids might be spilled on the shifter in the passenger compartment of the automobile
  • Quirks in the ECM

Replace/Repair These Parts To Fix OBD Code P2779

  1. Engine Control Module - There can be some engine performance issues due to faulty engine control module. If the ECM fails or has any problems it can lead to performance issues with the vehicle like misfires, hesitation, loss of power, and sometimes even decreased fuel economy.
  2. Powertrain Control Module - PCM stands for powertrain control module. It is a car part, a control unit which is utilized on motor vehicles. It is generally a combined control unit, consisting of the engine control unit (ECU) and the transmission control unit (TCU).
  3. Electronic Control Unit - If your automobile's check engine light remains on constantly, and never goes off, there's a good chance that your vehicle has a damaged electronic control unit. There are a lot of reasons why a car's check engine light will remain on. The most common reason is a defective ECU.
  4. Diagnostic Tools - It is always advisable to use the correct tools and equipment while resolving any OBD code issue as even small mistakes can lead to wrong diagnosis. Thus, always take help from a professional who has the knowledge and experience to such tools in an efficient manner. Buy new quality diagnostic tools from us today!
  5. Automatic Transmission Switch - Improper functioning of the downshift switch will affect the gear shifts and the transmission may slip or overheat. Thus, replace it in time.
  6. Shift Lever - If the shift lever has stopped functioning, you will not be able to shift gears and can completely break down the transmission system. Buy new shift lever now!

Symptoms Of OBD Error Code P2779

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P2779 here:

 

Common Symptoms

 

  • The service engine soon light can start lighting up
  • There may be no symptoms for this fault code
  • Disabled manual shifter function
  • The car might go into “limp mode”
  • Transmission may shift more abruptly
  • Torque converter lock up mode may be abolished
  • The overdrive light might start illuminating

How To Correct P2779 Downshift Switch Circuit Range/Performance

Here are some ways with the help of which you will be able to correct the OBD Code P2779.

 

  • You should wash the shifter area of any spilled liquids
  • Repair or replace the quirky electrical wiring, harnesses, or connectors
  • Make sure to mend the faulty downshift switch
  • Clear the codes and then your vehicle should be taken outside for a test drive

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have automatic transmission, Downshift Switch, powertrain control module, PCM, transmission wiring, Body Control Module, BCM, Shift lever and a lot more for our precious customers.

Easy Diagnosis Of Engine Error OBD Code P2779

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

 

  • Utilize an OBD-II scanner to check for a stored P2779 trouble code.
  • You should carefully examine the passenger compartment for any spills that may have got into the downshift switch.
  • Then you should monitor the circuits wiring for signs of defect, corrosion, or wear.
  • After that you should inspect the reference voltage and ground signals at the downshift switch and actuators.
  • A digital volt/ohmmeter should be utilized to examine the continuity and resistance if reference voltage and/or ground signals were open.
  • Carefully check all the associated circuits and switches for continuity and resistance.

Common Mistakes When Diagnosing The P2779 Code

 

  • The people should make sure that they examine if liquid spilled on the shifter in the passenger compartment before actually inspecting and diagnosing quirky transmission wiring.
  • The wiring or connectors at the shift switch location should be washed and then restored properly.

Other Diagnostic Codes Related To OBD Code P2779

P2780 - Downshift Switch Circuit Low

P2781 - Downshift Switch Circuit High

P2782 - Downshift Switch Circuit Intermittent/Erratic