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P0686 Audi Code - Engine Control Module Power Relay Control Circuit Low

- Code Popularity: 10,265 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P0686 Audi?

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 P0686 Audi?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0686 Audi code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P0686 Audi Description

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

OBDII Code P0686 Audi - Engine Control Module Power Relay Control Circuit Low - AutoCodes.com
P0686 Audi Code - Engine Control Module Power Relay Control Circuit Low

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Code P0686 Audi comments

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