P0687 ISUZU – Engine Control Module Power Relay Control Circuit High

P0687 ISUZU Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P0687 ISUZU Possible Causes

Faulty Engine Control Module (ECM) power relay,ECM power relay harness is open or shorted,ECM power relay circuit poor electrical connection,Faulty ECM

P0687 ISUZU Description

The Engine Control Module (ECM) monitors the power inputs. The ECM sets the OBDII code when the ECM detects a high power voltage input.