Possible causes
– Faulty pressure control solenoid valve ‘E’
– Pressure control solenoid valve ‘E’ harness is open or shorted
– Pressure control solenoid valve ‘E’ circuit poor electrical connection
– Faulty Engine Control Module (ECM)
– Low transmission fluid level
– Dirty transmission fluid
– Pressure control solenoid valve ‘E’ harness is open or shorted
– Pressure control solenoid valve ‘E’ circuit poor electrical connection
– Faulty Engine Control Module (ECM)
– Low transmission fluid level
– Dirty transmission fluid
Tech notes
There is a factory service bulletin for the 2004 Toyota Sienna
2004 Toyota Sienna Factory Service Bulletin OBDII Code P0985
2004 Toyota Sienna Factory Service Bulletin OBDII Code P0985
When is the code detected?
Engine Control Module (ECM) detectes an open or shorted condition on the solenoid circuit
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Shift shock
– Shift shock
P0985 TOYOTA Description
Shifting from 1st to 5th is performed in combination with