P0685

P0685 OBD Code Definition:
P0685 Electronic Control Module Power Control Circuit Malfunction
P0685 OBD Code Description:

OBD Code P0685

ECM/PCM Power Relay Control Circuit /Open

What’s mean?

OBD2 Code P0685 Definition:
The Engine Control Module (ECM) has detected that the ECM remains powered up after the ignition key has been turned off

Symptoms

Possible sumptoms of P0685
– Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

Possible causes of P0685
– ECM power control circuit is open or shorted – Failed ECM power relay – Failed ECM

Possible Solutions

One thought on “P0685

  1. charles

    does ecm power control circuit is open or shorted causes the car to not start i’m trying to find because my car won’t start and when i turn the key i get nothing no click ing or starting

    Reply

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