Possible causes

– Low transmission fluid level
– Dirty transmission fluid
– Faulty line pressure solenoid valve
– Line pressure solenoid valve harness is open or shorted
– Line pressure solenoid valve circuit poor electrical connection

Tech notes

When the a transmission solenoid is stuck off, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is very dirty, it is recommend changing the transmission fluid and if possible removing the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a transmission mechanical failure and that the transmission will need to be rebuilt or replaced.

When is the code detected?

The gear required by the Engine Control Module (ECM) does not match the actual gear when driving

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Transmission shift shock

P0746 Description

The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module (TCM).

P0746 Information for specific makes

P0746 ACURA
P0746 AUDI
P0746 CHEVROLET
P0746 FORD
P0746 GMC
P0746 HONDA
P0746 HYUNDAI
P0746 INFINITI
P0746 KIA
P0746 LEXUS
P0746 MAZDA
P0746 MITSUBISHI
P0746 NISSAN
P0746 SCION
P0746 TOYOTA
P0746 VOLKSWAGEN