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P3451 Chrysler Code - Cylinder 7 Deactivation Control Circuit Low

Quick Answer

The P3451 Chrysler code indicates a problem with the Cylinder 7 Deactivation Control Circuit being low. Common causes include Faulty Cylinder Deactivation Solenoid, Wiring issues in the Cylinder 7 Deactivation Control Circuit, Defective 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
P3451 Chrysler indicates Cylinder 7 Deactivation Control Circuit Low.
Common causes
Common causes include Faulty Cylinder Deactivation Solenoid, Wiring issues in the Cylinder 7 Deactivation Control Circuit, Defective 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 09, 2024
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Code P3451 Chrysler Description

The P3451 Chrysler code indicates a problem with the Cylinder 7 Deactivation Control Circuit being low. In Chrysler vehicles equipped with cylinder deactivation technology, certain cylinders will deactivate during light load conditions to improve fuel efficiency. Cylinder deactivation helps reduce fuel consumption by shutting down select cylinders when they are not needed, essentially operating as a smaller engine with fewer cylinders.

OBDII Code P3451 Chrysler - Cylinder 7 Deactivation Control Circuit Low
P3451 Chrysler Code - Cylinder 7 Deactivation Control Circuit Low

Common Causes of P3451 Chrysler

  1. Faulty Cylinder Deactivation Solenoid
  2. Wiring issues in the Cylinder 7 Deactivation Control Circuit
  3. Defective Engine Control Module (ECM)
  4. Poor connection or corrosion in the circuit
  5. Mechanical issue with the cylinder deactivation system

Symptoms of P3451 Chrysler

  1. Decreased fuel efficiency
  2. Rough idle
  3. Engine misfires
  4. Engine stalling
  5. Check Engine Light illuminated

How to Fix P3451 Chrysler

  1. Diagnose the issue using a diagnostic scanner to confirm the P3451 code and pinpoint the exact cause of the problem.
  2. Inspect the wiring and connections in the Cylinder 7 Deactivation Control Circuit for any damage or corrosion. Repair or replace as necessary.
  3. Test the Cylinder Deactivation Solenoid for proper functioning. Replace if faulty.
  4. Check the Engine Control Module (ECM) for any signs of damage or malfunction. Replace if necessary.
  5. Clear the code from the ECM memory and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P3451 Chrysler

The typical repair costs for addressing the P3451 Chrysler code can vary depending on the specific cause of the issue. On average, the cost of parts for this repair could range from $100 to $300, while the labor costs could range from $150 to $300. Overall, the total repair cost could be anywhere from $250 to $600. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the shop's labor rates. It's recommended to contact local auto repair shops for a more accurate cost estimate.

What does this mean?

Tech Notes for P3451 Chrysler

Although in some cases changing the engine oil may fix the problem, usually the Multi Displacement System Solenoid may need to replaced.

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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 P3451 Chrysler Code

1. What are the common symptoms of OBDII code P3451 in a Chrysler indicating Cylinder 7 Deactivation Control Circuit Low?

- Common symptoms include engine misfires, reduced engine performance, and the activation of the Check Engine light.

2. What are the possible causes of OBDII code P3451 in a Chrysler related to Cylinder 7 Deactivation Control Circuit Low?

- The code may be triggered by issues such as a faulty cylinder deactivation solenoid, damaged wiring or connectors, low oil pressure, or a malfunctioning engine control module.

3. How can I diagnose the Cylinder 7 Deactivation Control Circuit Low issue in my Chrysler when OBDII code P3451 is present?

- Diagnosis involves inspecting the wiring and connectors for any damage, testing the cylinder deactivation solenoid, checking oil pressure levels, and scanning for any related trouble codes.

4. Can I continue to drive my Chrysler with OBDII code P3451 indicating Cylinder 7 Deactivation Control Circuit Low?

- It is not recommended to drive the vehicle for an extended period with this code active, as it can lead to engine damage and reduced fuel efficiency.

5. What are some repair tips for resolving OBDII code P3451 in a Chrysler related to Cylinder 7 Deactivation Control Circuit Low?

- Repair tips include replacing a faulty cylinder deactivation solenoid, repairing or replacing damaged wiring or connectors, ensuring proper oil pressure, and resetting the engine control module after repairs are completed.

6. Is it possible to reset the Check Engine light after resolving OBDII code P3451 in a Chrysler?

- Yes, the Check Engine light can be reset using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the stored trouble codes.

7. How much can I expect to pay for professional repairs related to OBDII code P3451 in a Chrysler with Cylinder 7 Deactivation Control Circuit Low?

- Repair costs can vary depending on the exact cause of the issue, but expect to pay anywhere from $200 to $600 for parts and labor at a dealership or auto repair shop.

8. Will OBDII code P3451 in a Chrysler reset itself after the issue is resolved?

- The code may reset itself after a few drive cycles if the underlying problem has been successfully fixed. If not, an OBDII scanner can be used to clear the code manually.

9. Are there any preventive measures to avoid encountering OBDII code P3451 related to Cylinder 7 Deactivation Control Circuit Low in a Chrysler?

- Regular maintenance, such as oil changes and using high-quality engine oil, can help prevent issues that may trigger this code. Additionally, addressing any engine performance problems promptly can help avoid more serious issues.

10. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P3451 indicating Cylinder 7 Deactivation Control Circuit Low in a Chrysler?

- While some DIYers may be able to diagnose and replace components like the cylinder deactivation solenoid or damaged wiring, it is recommended to consult a professional technician for complex diagnosis and repairs to ensure the issue is properly resolved.

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