The P3489: Cylinder 12 Deactivation/Intake Valve Control Circuit/Open refers to an issue where there is an open circuit in the intake valve control system for Cylinder 12. This problem can arise from faulty wiring or connections, or a malfunctioning intake valve control solenoid, which can impair the operation of the intake valves.
P3489 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P3489: Cylinder 12 Deactivation/Intake Valve Control Circuit/Open |
| Is it serious? | Yes, this code can lead to performance issues and may cause engine misfiring. |
| Possible causes | – Open circuit in the intake valve control for Cylinder 12 – Faulty wiring or connections – Malfunctioning intake valve control solenoid |
| How to diagnose? | – Inspect the intake valve control circuit for Cylinder 12 – Check wiring and connections for continuity – Test the intake valve control solenoid – Repair or replace faulty components as necessary |
P3489 Meaning
The P3489: Cylinder 12 Deactivation/Intake Valve Control Circuit/Open code indicates that there is an open circuit in the intake valve control system for Cylinder 12. This issue can stem from damaged wiring or a faulty solenoid, leading to problems with the operation of the intake valves, which may result in poor engine performance.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional codes that may provide further context for the issue. | OBD-II Scanner |
| Inspect the Intake Valve Control Circuit | Visually inspect the intake valve control circuit for Cylinder 12 for any visible damage or wear. | Flashlight, Safety Gloves |
| Check Wiring and Connections | Use a multimeter to check for continuity in the wiring and connections related to Cylinder 12. | Multimeter |
| Test the Intake Valve Control Solenoid | Test the intake valve control solenoid to ensure it is functioning properly and is not causing circuit issues. | Multimeter, Diagnostic Tool |
| Repair or Replace Faulty Components | Based on the findings from previous steps, repair or replace any damaged wiring, connectors, or the solenoid as necessary. | Basic Hand Tools |
| Clear the Code and Test Drive | After repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to verify that the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P3489 code has not returned. If it does, further diagnosis may be needed. | OBD-II Scanner |
Free PDF: How to choose OBD2 scanner
I’ve made you a free PDF to choose the OBD2 scanner in 5 minutes.
✅ Which OBD2 scanner is best?
✅ Which type should you get (DIY, Pro, Hobby)
✅ What is the best scanner for the exact brand/feature (e.g best for BMW)
✅ How to get a Bi-Directional tool for as cheap as $40
✅ Discount coupons for scanners
PDF is 100% free and it is designed to help you pick a scanner in less than a few minutes! Not a boring 50-page guide.
Just tell me where to send it.
Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)