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P0685 Chrysler Code - Auto Shutdown Relay Control Circuit Failure

Quick Answer

The P0685 code for Chrysler vehicles indicates a problem with the Auto Shutdown (ASD) relay control circuit. Common causes include Faulty ASD relay, Wiring issues or shorts in the relay control circuit, Problems with the Engine Control Module (ECM). 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
P0685 Chrysler indicates Auto Shutdown Relay Control Circuit Failure.
Common causes
Common causes include Faulty ASD relay, Wiring issues or shorts in the relay control circuit, Problems with the Engine Control Module (ECM).
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P0685 Chrysler Description

The P0685 code for Chrysler vehicles indicates a problem with the Auto Shutdown (ASD) relay control circuit. The ASD relay is responsible for providing power to the vehicle's ignition system, fuel injectors, and other essential components during startup and operation. When this circuit fails, it can lead to a variety of issues that can affect the vehicle's performance and overall functionality.

OBDII Code P0685 Chrysler - Auto Shutdown Relay Control Circuit Failure
P0685 Chrysler Code - Auto Shutdown Relay Control Circuit Failure

Common Causes of P0685 Chrysler

  1. Faulty ASD relay
  2. Wiring issues or shorts in the relay control circuit
  3. Problems with the Engine Control Module (ECM)
  4. Corrosion or poor connections in the relay circuit
  5. Electrical issues such as a dead battery or alternator problems

Symptoms of P0685 Chrysler

  1. Engine cranks but does not start
  2. Engine stalls or shuts off unexpectedly
  3. Check Engine Light is illuminated
  4. Poor engine performance or rough idling
  5. Difficulty starting the vehicle

How to Fix P0685 Chrysler

  1. Begin by diagnosing the specific cause of the ASD relay control circuit failure using a diagnostic scanner to retrieve trouble codes and pinpoint the issue.
  2. Inspect the wiring and connections related to the ASD relay for any signs of damage, corrosion, or loose connections. Repair or replace any faulty wiring.
  3. Test the ASD relay itself to determine if it is functioning correctly. Replace the relay if necessary.
  4. Check the ECM for any signs of damage or malfunction. Reset or reprogram the ECM as needed to address the issue.
  5. Clear the trouble codes from the vehicle's computer system and test the vehicle to ensure that the issue has been resolved.

Cost to Fix P0685 Chrysler

The cost of repairing a P0685 code for Chrysler vehicles can vary depending on the specific cause of the issue and the extent of the repairs needed. Typically, the cost of replacing an ASD relay can range from $50 to $150, while addressing wiring issues or ECM problems may require additional labor and parts costs. In general, you can expect to pay anywhere from $100 to $500 for repairs related to the ASD relay control circuit failure. Keep in mind that labor rates and parts prices can vary significantly based on location and the specific vehicle model, so it's a good idea to consult with a professional mechanic for a more accurate cost estimate.

What does this mean?

Tech Notes for P0685 Chrysler

Check all the Engine Control Module (ECM) fuses, if the fuses are OK, then replacing the Auto Shutdown (ASD) relay should take care of the problem.

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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 P0685 Chrysler Code

1. What are the common symptoms of OBDII code P0685 Chrysler (Auto Shutdown Relay Control Circuit Failure)?

- Common symptoms include engine stalling, difficulty starting the vehicle, and the Check Engine light illuminating on the dashboard.

2. What are the possible causes of OBDII code P0685 Chrysler?

- The code P0685 Chrysler can be caused by a faulty auto shutdown relay, issues with the relay control circuit, a blown fuse, or wiring problems.

3. How can I diagnose the Auto Shutdown Relay Control Circuit Failure related to code P0685 in my Chrysler?

- Diagnose the issue by checking the auto shutdown relay, inspecting the relay control circuit for damage, testing fuses related to the circuit, and verifying the wiring connections for any faults.

4. Can a bad battery cause the OBDII code P0685 Chrysler to appear?

- Yes, a weak or failing battery can sometimes trigger the P0685 code due to insufficient power supply affecting the auto shutdown relay operation.

5. How can I repair OBDII code P0685 Chrysler at home?

- You can attempt to repair the issue at home by replacing the auto shutdown relay if it is faulty, checking and replacing any damaged fuses, and ensuring all wiring connections are secure.

6. Is it safe to continue driving my Chrysler with the P0685 code present?

- It is not recommended to drive your vehicle with the P0685 code active, as it can lead to potential engine stalling and other safety concerns while on the road.

7. Can a mechanic reset the OBDII code P0685 Chrysler without fixing the underlying issue?

- While a mechanic can clear the code from the system, it is crucial to address the root cause of the problem to prevent the code from reappearing and causing further issues.

8. How much does it typically cost to repair OBDII code P0685 Chrysler at a repair shop?

- The cost of repairing the P0685 code can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Are there any preventive measures to avoid OBDII code P0685 Chrysler in the future?

- To prevent the P0685 code from occurring, regularly inspect and maintain your vehicle's electrical system, including the auto shutdown relay, fuses, and wiring connections.

10. Will disconnecting the battery reset the OBDII code P0685 Chrysler?

- Disconnecting the battery may temporarily clear the code, but it is not a recommended method to address the underlying issue causing the Auto Shutdown Relay Control Circuit Failure.

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