P0688 Ford Code - Electronic Control Module Power Relay Sense Circuit/Open
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
- P0688 Ford indicates Electronic Control Module Power Relay Sense Circuit/Open.
- 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 P0688 Ford Description
What are the Possible Causes of the DTC P0688 Ford?
- 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 P0688 Ford?
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 P0688 Ford 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 P0688 Ford code?
Need more information on how to fix the P0688 Ford code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0688 Ford code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0688 Ford Code
1. What are the common symptoms of OBDII code P0688 in a Ford vehicle?
- Common symptoms include engine stalling, difficulty starting the vehicle, and illuminated Check Engine Light.
2. What does the OBDII code P0688 Ford indicate?
- The code indicates an issue with the Electronic Control Module Power Relay Sense Circuit/Open.
3. What are the possible causes of the P0688 code in a Ford vehicle?
- Possible causes include a faulty power relay, damaged wiring or connectors in the power relay circuit, or a malfunctioning Electronic Control Module.
4. How can I diagnose the cause of the P0688 code in my Ford vehicle?
- Diagnose by checking the power relay for proper functioning, inspecting the wiring and connectors for damage, and testing the Electronic Control Module for faults.
5. Can I drive my Ford vehicle with the P0688 code present?
- It is not recommended to drive the vehicle with the P0688 code present, as it can lead to potential engine performance issues and further damage.
6. Is it possible to reset the P0688 code in a Ford vehicle?
- It is possible to reset the code using an OBDII scanner, but the underlying issue causing the code should be diagnosed and repaired to prevent it from reoccurring.
7. How much does it typically cost to repair the P0688 code in a Ford vehicle?
- The cost of repair can vary depending on the specific cause of the code, but it may range from $100 to $300 for parts and labor.
8. Are there any DIY repair tips for addressing the P0688 code in a Ford vehicle?
- DIY tips include checking and replacing the power relay, inspecting wiring for damage, and ensuring all connections are secure and free of corrosion.
9. Can a faulty battery or alternator cause the P0688 code to appear in a Ford vehicle?
- Yes, a weak or failing battery or alternator can potentially trigger the P0688 code due to insufficient power supply to the Electronic Control Module.
10. How urgent is it to address the P0688 code in a Ford vehicle?
- It is important to address the code promptly to prevent potential engine performance issues and avoid further electrical system damage.
Discuss the causes and fixes for P0688 Ford OBDII Code
Code P0688 Ford comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
