P3491
Cylinder 12 Deactivation/Intake Valve Control Circuit Low
P3491 is an OBD-II diagnostic trouble code meaning: Cylinder 12 Deactivation/Intake Valve Control Circuit Low. Common causes: open or short circuit in control circuit, malfunction of the solenoid valve of cylinder 12. Estimated repair cost: $17–56.
Symptoms
- Loss of engine power
- Uneven engine operation
- Increased fuel consumption
- Check Engine Light Is On
- Possible misfire in cylinder 12
Causes
- Open or short circuit in control circuit
- Malfunction of the solenoid valve of cylinder 12
- Wiring Harness Problems
- Engine control unit malfunction
- Poor contact in connectors
How to Fix
- Check the integrity of the control circuit
- Check the resistance of the solenoid valve
- Inspect the wiring harness for damage
- Check connections and connectors
- If necessary, replace the solenoid valve
Related codes
Error P3491 by Vehicle Brand
FAQ
What does the P3491 code mean?
P3491 is an OBD-II diagnostic trouble code that indicates: Cylinder 12 Deactivation/Intake Valve Control Circuit Low
What causes a P3491 error code?
The most common causes of P3491 include: Open or short circuit in control circuit; Malfunction of the solenoid valve of cylinder 12; Wiring Harness Problems; Engine control unit malfunction.
How do I fix a P3491 diagnostic trouble code?
To fix P3491: Check the integrity of the control circuit. Check the resistance of the solenoid valve. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P3491?
Limited driving only, diagnose soon
How much does it cost to fix P3491?
The estimated repair cost for P3491 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat