P3904 Trouble Code

View P3904 obd/2 error code description and symptoms. P3904 engine photo

The input turbine speed sensor detects rotation of the input shaft of the input shaft speed sensor transmission. The computer uses that information, along with the output shaft speed sensor to determine if the transmission is operating according to plan. If the computer detects a difference between the input shaft speed , and the expected output shaft speed, it will adjust transmission pump pressure to prevent clutch disc slip. If adding pressure doesn't solve the problem, it will set a trouble code.

To check for an open circuit, trace along the length of the transmission control circuit, checking for breaks in the wiring. Repair any broken wiring and make sure all connectors are fully seated and locked.Pay close attention to connectors, looking for corrosion, bent or broken pins, or moisture in the connector. Repair any connector issues even if they are not specifically part of the transmission control circuit as they may serve a function in providing power to the transmission control circuit.

P3904 Error Code Repair Process :

If your vaps solenoid actuator return circuit short to battery check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P3904 and engine control unit are in charge of monitoring a bunch of different vaps solenoid actuator return circuit short to battery, and if they get a reading that's a little out of whack, up pops the check engine light.

P3904 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 P3904

A common cause of code P3904 is the failure of VAPS Solenoid Actuator Return Circuit Short To Battery, but there are several other possible causes as well, such as ;

Faulty Air Flow Meter
Faulty Air fuel ratio (A/F) Sensor 1 Bank 1
Fuel injectors may be faulty
Oil flow restriction in the oil passages or the VCT valve body

P3904 code for all cars

You can view according P3904 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P3904 Fiat Ecobasis

+P3904 Nag K5

+P3904 Chrysler Charger

+P3904 Citroen Mehari

+P3904 Allard Safari

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

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