P0789 Code - Shift/Timing Solenoid Intermittent

What does P0789 Mean?

Shift solenoid valve ST is switched ON OFF by a signal from Engine Control Module (ECM) so that let in or out timing of 2nd brake is adjusted by operating orifice control valve. Therefore, shift solenoid valve ST operates when letting in or out reverse clutch.

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What are the common causes of P0789 ?

Common causes include a faulty shift solenoid, hydraulic blockages inside the internal transmission fluid passages, mechanical internal transmission failures, low transmission fluid, dirty or contaminated transmission fluid, a faulty PCM or transmission control module.



How do you troubleshoot P0789 ?

Deactivation of cylinders is achieved by releasing a synchroniser pin that normally interlocks the cam follower and rocker arms. P0789 code resolves the synchroniser pin is released using hydraulic pressure which is controlled by a dedicated solenoid.

Searches related to P0789 Code - Shift/Timing Solenoid Intermittent

• P0789
• P0788