P3929 Trouble Code

View P3929 obd/2 error code description and symptoms. P3929 engine photo

The Transmission Fluid Pressure Switch allows the engine's control module (PCM) or Transmission Control Module (TCM) to use hydraulic fluid to engage the clutches in the transmission to allow for smoother shifting while driving. If the PCM or TCM detects an issue with the hydraulic clutch or the pressure switch, the PCM or TCM will set code P3929

Regardless of the design though, the purpose of all clutch actuating systems is to improve the driving experience by removing the need for manual clutch operation by the driver. Computer-controlled clutch actuating systems work particularly well in dual clutch systems where one clutch controls gear changes of even-numbered gear ratios, and a second clutch that controls gear changes of odd-numbered ratios.

P3929 Error Code Repair Process :

If your vehicle failed a P3929 test and the P3929 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses master cylinder pressure sensor circuit open a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look master cylinder pressure sensor circuit open: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

P3929 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Common Causes of P3929

A common cause of code P3929 is the failure of Master Cylinder Pressure Sensor Circuit Open, but there are several other possible causes as well, such as ;

Continuous oil flow to the VCT piston chamber
Exhaust gas leaks
Fuel pressure
Incorrect fuel filler cap used

P3929 code for all cars

You can view according P3929 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P3929 Renault Primaquatre

+P3929 Mitsubishi Colt

+P3929 Mercedes Slk 350

+P3929 Saab 95

+P3929 Peugeot 505

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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