P189C Function restriction:Due to insufficient pressure build up

Fault code P189C Function restriction:Due to insufficient pressure build up is related to the problem in automatic transmission gear box. Fault code P189C Function restriction:Due to insufficient pressure build up store in Transmission control module when there is no enough pressure build up in gear box. In automatic transmission gear box gear shifting procedure occurs by oil pressure. Mechatronic is a electrical control module which is use to shift gear at certain speed of vehicle as per the requirements. There are solenoid located at the Mechatronic which get activate by transmission control module. These solenoid valve is use to make oil pressure in result which gear shifting occurred.

Causes P189C Function restriction:Due to insufficient pressure build up :

  • Low quantity of oil in gear box.
  • Faulty solenoid.
  • Failure of mechatronic.
  • Dirty oil or thick oil
  • Failure of mechanical part in gear box.

Symptoms :

  • Transmission indicator light will start flashing on gear leaver.
  • There will be no gear shifting.
  • Fault code will store in transmission control module.
  • There is no reverse gear shifting.
  • Vehicle will not move.

How To Trouble shoot :

  • As this fault code P189C is related to the automatic transmission gear gear box. A highly professional mechanic of automatic gear box repair is require to solve this problem.
  • Mechanic need to scan the vehicle to find out the fault code which is causing the problem. Find the fault cofe and rectify it.
  • When found fault code P189C. First of all check the level of oil inthe gear box. if oil level is not enough to the manufacturers requirement. Fill oil to the proper level which will solve the problem.
  • If oil level is enough as per the requirements. Then check the quality of oil in gear box. At certain kilometre of driving oil become so thick which will also lead to store this fault code.
  • Check both oil level and oil quantity if all these thing is ok then go to check other things.
  • Next thing is to check for this problem is mechatronic it self which can be fail. A failure of mechatronic or solenoid valve in it is also responsible for this problem.
  • check each solenoid valve for it working. If found any one which is not working than change it. Check mechatronic for its failure if found faulty than change it. After replacement of mechatronic perform coding programming and basic setting.

How risky it is to drive with fault code P189C

  • Driving with fault code P189C Function restriction:Due to insufficient pressure build up is highly risky as it is a problem which is related to the automatic transmission gear box.
  • When Automatic transmission gear box is faulty vehicle will not run smoothly. It can get stuck at any gear at any speed and that will be risky.
  • When gear get stuck a position it is possible that the car may not start. But if it start then also it will not move from it place.

Solutio of P189C P189C Function restriction:Due to insufficient pressure build up :

  • Fill transmission oil to the proper level as per the manufacturer requirements.
  • Replace dirty oil.
  • Repair or replace faulty solenoid valve.
  • Replace faulty mechatronic.
  • Repair damage wiring harness.
  • Perform coding and programming and also basic setting.
TCM control module

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