P3420 Dodge Code - Cylinder 3 Deactivation Control Circuit High
Quick Answer
The P3420 diagnostic trouble code for Dodge vehicles specifically refers to an issue with the Cylinder 3 Deactivation Control Circuit being detected as too high. Common causes include Faulty cylinder deactivation solenoid, Wiring issues or shorts in the deactivation control circuit, ECM (Engine Control Module) malfunction. 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
- P3420 Dodge indicates Cylinder 3 Deactivation Control Circuit High.
- Common causes
- Common causes include Faulty cylinder deactivation solenoid, Wiring issues or shorts in the deactivation control circuit, ECM (Engine Control Module) malfunction.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P3420 Dodge Description
The P3420 diagnostic trouble code for Dodge vehicles specifically refers to an issue with the Cylinder 3 Deactivation Control Circuit being detected as too high. This code indicates that there is a problem with the circuit responsible for deactivating cylinder 3 in the engine, which is a feature commonly found in modern vehicles to improve fuel efficiency by shutting down cylinders when they are not needed. When this circuit malfunctions and remains in the high state, it can lead to various performance issues and potential long-term damage if not addressed promptly.
Common Causes of P3420 Dodge
- Faulty cylinder deactivation solenoid
- Wiring issues or shorts in the deactivation control circuit
- ECM (Engine Control Module) malfunction
- Mechanical issues with cylinder 3 or related components
- Poor oil pressure or sludge buildup affecting cylinder deactivation operation
Symptoms of P3420 Dodge
- Check engine light illuminated on the dashboard
- Decreased fuel efficiency
- Engine misfires or rough idling
- Loss of power or acceleration
- Engine knocking or pinging noises
How to Fix P3420 Dodge
- Begin by conducting a visual inspection of the wiring and connections related to the cylinder deactivation control circuit.
- Test the cylinder deactivation solenoid for proper operation and replace if necessary.
- Check the ECM for any fault codes or programming issues and reset if needed.
- Inspect cylinder 3 for any mechanical issues that may be affecting its operation, such as low compression or valve problems.
- Ensure proper oil pressure and cleanliness in the engine to prevent future issues with cylinder deactivation.
Cost to Fix P3420 Dodge
The cost of repairing a P3420 code for Cylinder 3 Deactivation Control Circuit High can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $150 to $500 for parts and labor. Keep in mind that diagnostic time and hourly rates at auto repair shops can influence the final cost, so it's recommended to obtain quotes from multiple sources before proceeding with the repair.
Tech Notes for P3420 Dodge
Need more information about the P3420 Dodge code?
Need more information on how to fix the P3420 Dodge code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P3420 Dodge code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P3420 Dodge Code
1. What does the OBDII code P3420 mean on a Dodge vehicle?
P3420 indicates a problem in the Cylinder 3 Deactivation Control Circuit, specifically a high voltage condition.
2. What are the symptoms of the P3420 code on a Dodge?
Common symptoms include reduced engine performance, poor fuel economy, a rough idle, and the Check Engine Light being illuminated.
3. What causes the P3420 code on a Dodge?
Causes can include a faulty cylinder deactivation solenoid, damaged wiring or connectors in the control circuit, low oil pressure, or issues with the engine control module (ECM).
4. Can I drive my Dodge with the P3420 code?
Driving with this code is possible but not recommended, as it may lead to further engine damage or reduced fuel efficiency.
5. How do I diagnose the P3420 code on my Dodge?
Start by inspecting the wiring and connectors for damage, checking the cylinder deactivation solenoid, and verifying proper oil pressure. Use a multimeter to test for circuit voltage abnormalities.
6. What repairs can fix the P3420 code on a Dodge?
Repairs may include replacing the cylinder deactivation solenoid, repairing or replacing damaged wiring or connectors, addressing oil pressure issues, or reprogramming/replacing the ECM.
7. How much does it cost to fix the P3420 code on a Dodge?
Repair costs can range from $100 to $500, depending on whether you need to replace the solenoid, fix wiring, or address ECM issues.
8. Can low oil pressure cause the P3420 code on a Dodge?
Yes, low oil pressure can lead to improper cylinder deactivation operation, triggering the P3420 code.
9. How can I prevent the P3420 code on my Dodge?
Regular maintenance, including oil changes and inspections of wiring and connectors, can help prevent this code from appearing.
10. Will clearing the P3420 code fix the issue on my Dodge?
Clearing the code may temporarily turn off the Check Engine Light, but the underlying issue must be addressed to prevent the code from returning.
Discuss the causes and fixes for P3420 Dodge OBDII Code
Code P3420 Dodge 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.