Symptoms

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

Possible Causes

- Faulty secondary line pressure solenoid valve - Secondary pressure solenoid valve harness or connectors - Secondary pressure solenoid valve circuit is open or shorted - Low transmission fluid level - Dirty transmission fluid

When Detected

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

Description

The secondary 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).