P0687 Audi 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 Audi 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.
Code P0687 Audi Description
What are the Possible Causes of the DTC P0687 Audi?
- 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 Audi?
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 Audi 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.
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Frequently Asked Questions about P0687 Audi Code
1. What does the OBDII code P0687 mean on an Audi?
The code P0687 indicates a problem with the Engine Control Module (ECM) power relay control circuit, specifically a high voltage issue.
2. What are the symptoms of the P0687 code in an Audi?
Symptoms may include difficulty starting the engine, engine stalling, reduced performance, or the check engine light illuminating.
3. What causes the P0687 code to appear in an Audi?
Common causes include a faulty ECM power relay, damaged wiring or connectors in the circuit, a blown fuse, or, in rare cases, a failing ECM.
4. Can I drive my Audi with the P0687 code?
While the car may still run, driving with this code can lead to unreliable engine performance or potential stalling, so it's best to address it promptly.
5. How do I diagnose the P0687 code in my Audi?
Diagnosis involves checking the ECM power relay, inspecting the circuit for damaged wires or loose connections, and testing the relay control circuit for proper voltage.
6. How can I fix the P0687 code on my Audi?
Repairs may include replacing the ECM power relay, repairing or replacing damaged wiring, tightening loose connections, or replacing a blown fuse.
7. How much does it cost to repair the P0687 code on an Audi?
Costs can vary but typically range from $50 to $200 for parts and labor, depending on whether the issue lies with the relay, wiring, or other components.
8. Can a bad battery cause the P0687 code in an Audi?
Yes, a weak or failing battery could cause voltage issues that trigger this code, though it is less common.
9. Does the P0687 code require ECM replacement in an Audi?
ECM replacement is rarely needed and should only be considered after verifying that all other components and wiring in the circuit are functioning correctly.
10. What tools do I need to fix the P0687 code in my Audi?
Basic tools include a multimeter for voltage testing, a code scanner for diagnostics, and potentially replacement parts like a power relay or fuse.
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