Engine-Codes - Generic - P0687

P0687 Code - Engine Control Module Power Relay Control Circuit High

- Code Popularity: 22,029 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC P0687?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Weak battery
  • Low voltage while cranking
  • Faulty Engine Control Module (ECM) power relay
  • ECM power relay harness is open or shorted
  • ECM power relay circuit poor electrical connection
  • Blown ECM fuse
  • Faulty ECM
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How to Fix the DTC P0687?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0687 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P0687 Code Mean?

The powertrain relay is a normally open relay. The relay armature is held in the open position by spring tension. Battery positive voltage is supplied directly to the relay coil and the armature contact at all times. The Engine Control Module (ECM) supplies the ground path to the relay coil control circuit via an internal integrated circuit called an Output Driver Module (ODM). The ODM output control is configured to operate as a low side driver for the powertrain relay. The ODM for the powertrain relay also incorporates a fault detection circuit, which is continuously monitored by the ECM. When the ECM commands the powertrain relay ON, ignition 1 voltage is supplied to the ECM, and to several additional circuits.

P0687 Code - Engine Control Module Power Relay Control Circuit High

Need more Information on the Code?

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Code P0687 Information for Specific Makes

  • P0687 Audi Engine Control Module Power Relay Control Circuit High
  • P0687 BMW Engine Control Module Power Relay Control Circuit High
  • P0687 Buick Engine Control Module Power Relay Control Circuit High  📷
  • P0687 Cadillac Engine Control Module Power Relay Control Circuit High  📷
  • P0687 Chevrolet Engine Control Module Power Relay Control Circuit High  📷
  • P0687 Chrysler Engine Control Module Power Relay Control Circuit High
  • P0687 Dodge Engine Control Module Power Relay Control Circuit High
  • P0687 Ford Engine Control Module Power Relay Control Circuit High
  • P0687 GMC Engine Control Module Power Relay Control Circuit High  📷
  • P0687 Isuzu Engine Control Module Power Relay Control Circuit High
  • P0687 Jeep Engine Control Module Power Relay Control Circuit High
  • P0687 Lincoln Engine Control Module Power Relay Control Circuit High
  • P0687 Mercury Engine Control Module Power Relay Control Circuit High
  • P0687 MINI Engine Control Module Power Relay Control Circuit High
  • P0687 Pontiac Engine Control Module Power Relay Control Circuit High  📷
  • P0687 Saturn Engine Control Module Power Relay Control Circuit High  📷
  • P0687 Suzuki Engine Control Module Power Relay Control Circuit High
  • P0687 Volkswagen Engine Control Module Power Relay Control Circuit High

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