AutoCodes – Mercury – P2685 Mercury

P2685 Mercury Code - Actuator Supply Voltage 'C' Circuit Low

Quick Answer

The Powertrain Control Module (PCM) monitors the transmission solenoid circuits by supplying voltage to the solenoids through this circuit, then checking for voltage returning from the solenoids through each of the individual solenoid control wires. Common causes include Faulty Transmission Solenoids, Transmission Solenoids harness is open or shorted, Transmission Solenoids 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
P2685 Mercury indicates Actuator Supply Voltage 'C' Circuit Low.
Common causes
Common causes include Faulty Transmission Solenoids, Transmission Solenoids harness is open or shorted, Transmission Solenoids 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 1,313
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 25, 2019
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Code P2685 Mercury Description

The Powertrain Control Module (PCM) monitors the transmission solenoid circuits by supplying voltage to the solenoids through this circuit, then checking for voltage returning from the solenoids through each of the individual solenoid control wires. If one of the solenoid return circuits does not have the correct voltage returning to the PCM, the PCM will set a code for that solenoid.
OBDII Code P2685 Mercury - Actuator Supply Voltage 'C' Circuit Low - AutoCodes.com
P2685 Mercury Code - Actuator Supply Voltage 'C' Circuit Low

What are the Possible Causes of the DTC P2685 Mercury?

  • Faulty Transmission Solenoids
  • Transmission Solenoids harness is open or shorted
  • Transmission Solenoids circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

How to Fix the DTC P2685 Mercury?

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 P2685 Mercury 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 P2685 Mercury code?

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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 P2685 Mercury Code

1. What are the common symptoms of OBDII code P2685 in a Mercury vehicle?

- Common symptoms include engine misfires, rough idling, reduced power, and illuminated check engine light.

2. What does the OBDII code P2685 in a Mercury indicate?

- This code indicates a low voltage condition in the 'C' circuit of the actuator supply voltage system.

3. What are the possible causes of OBDII code P2685 in a Mercury?

- Possible causes include a faulty actuator supply voltage relay, damaged wiring or connectors, or a defective actuator supply voltage sensor.

4. How can I diagnose the OBDII code P2685 in my Mercury?

- You can diagnose the code by visually inspecting the wiring and connectors, testing the actuator supply voltage relay, and checking the actuator supply voltage sensor using a multimeter.

5. Can a DIY enthusiast repair OBDII code P2685 in a Mercury?

- Yes, depending on the exact cause, a DIY enthusiast with some automotive knowledge can repair this code by replacing faulty components or repairing damaged wiring.

6. Is it safe to continue driving with OBDII code P2685 present in a Mercury?

- It is not recommended to continue driving with this code present, as it can lead to engine performance issues and potential damage if left unresolved.

7. How much does it typically cost to repair OBDII code P2685 in a Mercury at a repair shop?

- The cost of repair can vary depending on the exact cause and labor rates, but it may range from $100 to $300 or more at a repair shop.

8. Are there any preventive measures to avoid OBDII code P2685 in a Mercury?

- Regular vehicle maintenance, such as checking and replacing worn-out components, can help prevent issues that may trigger this code.

9. Can extreme weather conditions affect the likelihood of OBDII code P2685 occurring in a Mercury?

- Yes, extreme weather conditions can sometimes lead to electrical issues that may trigger this code, so it's important to ensure proper vehicle maintenance in all seasons.

10. How long does it typically take to repair OBDII code P2685 in a Mercury?

- The repair time can vary depending on the exact cause and the availability of parts, but it may take anywhere from 1 to 3 hours to complete the repair.

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