AutoCodes – Volkswagen – P0687 Volkswagen

P0687 Volkswagen Code - Engine Control Module Power Relay Control Circuit High

Quick Answer

The Engine Control Module (ECM) monitors the power inputs. Common causes include Faulty Engine Control Module (ECM) power relay, ECM power relay harness is open or shorted, ECM power relay circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0687 Volkswagen indicates Engine Control Module Power Relay Control Circuit High.
Common causes: Common causes include Faulty Engine Control Module (ECM) power relay, ECM power relay harness is open or shorted, ECM power relay circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 13,128

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 05, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0687 Volkswagen 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.

OBDII Code P0687 Volkswagen - Engine Control Module Power Relay Control Circuit High - AutoCodes.com — P0687 Volkswagen Code - Engine Control Module Power Relay Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P0687 Volkswagen?

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

How to Fix the DTC P0687 Volkswagen?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0687 Volkswagen code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0687 Volkswagen code?

Need more information on how to fix the P0687 Volkswagen code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0687 Volkswagen code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0687 Volkswagen Code

1. What are the common symptoms of OBDII code P0687 in a Volkswagen?

- Common symptoms include rough idling, engine stalling, poor acceleration, and the illumination of the Check Engine light.

2. What can cause the Engine Control Module Power Relay Control Circuit High code (P0687) in a Volkswagen?

- The code P0687 is often triggered by a faulty engine control module power relay, damaged wiring, or a malfunctioning engine control module itself.

3. How can I diagnose the cause of OBDII code P0687 in my Volkswagen?

- To diagnose code P0687, you may need to check the power relay, inspect the wiring for damage, and test the engine control module using a diagnostic scanner.

4. Can a bad battery or alternator cause OBDII code P0687 to appear in a Volkswagen?

- Yes, a weak battery or a failing alternator can sometimes cause voltage fluctuations that lead to the triggering of code P0687.

5. What are the possible repair options for resolving the Engine Control Module Power Relay Control Circuit High code in a Volkswagen?

- Repair options may include replacing the faulty power relay, repairing damaged wiring, or replacing the engine control module if necessary.

6. Is it safe to continue driving my Volkswagen with OBDII code P0687 present?

- It is not recommended to drive your vehicle with code P0687 active, as it can lead to further engine performance issues or potential damage.

7. Can a DIY enthusiast fix OBDII code P0687 in a Volkswagen, or should I seek professional help?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to troubleshoot and repair code P0687, but seeking professional help is advisable for accurate diagnosis and repair.

8. Will resetting the check engine light make OBDII code P0687 go away in my Volkswagen?

- Resetting the check engine light may temporarily turn off the warning, but if the underlying issue causing code P0687 is not fixed, the light is likely to come back on.

9. How much does it typically cost to repair OBDII code P0687 in a Volkswagen at a repair shop?

- The cost of repairing code P0687 can vary depending on the extent of the issue, but it may range from $100 to $500 or more, including parts and labor.

10. Can preventative maintenance help prevent the recurrence of OBDII code P0687 in my Volkswagen?

- Regular maintenance, such as checking the battery, alternator, and electrical system, can help prevent issues like code P0687 from occurring, but it may not eliminate all potential causes.