P0689 Code - Electronic Control Module Power Relay Sense Circuit Low

What does P0689 Mean?

The Engine Control Module (ECM) monitors the power inputs. The ECM sets the OBDII code when the ECM remains powered up after the ignition switch has been turned OFF.

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What are the common causes of P0689 ?

In choosing a single most common cause, I would have to say a faulty PCM relay. Other common causes may include a blown fuse, a bad fusible link, shorted or open circuits, a defective battery, faulty battery cables/cable ends, or a defective PCM.



How do you troubleshoot P0689 ?

The engine system, in conjuction with the engine control module (ECM)/powertrain control module (PCM), activates the P0689 code solenoid valve to control oil pressure to the engine mechanism that is installed in the valve system to switch valve timing between Low and High.If the engine solenoid valve has an open or short circuit, a DTC is stored.

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