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P3484 is a diagnostic trouble code (DTC) for "Cylinder 11 Deactivation/Intake Valve Control Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P3484 code indicates that the PCM has detected a range of voltage readings for the cylinder deactivation mode within cylinder 11 that is too high compared to the manufacturer’s specifications.
The ECM regulates fuel economy by commanding certain cylinders to deactivate during certain driving conditions. During the deactivation command of cylinder 11, a signal is sent to the PCM informing it of the current operation efficiency via a voltage reading. If the voltage reading is too high compared to manufacturer specifications, the PCM will store the P3484 code.
There are quite a few things that can cause the P3484 code. Those include:
In most cases, only the illuminated Check Engine Light will be present with the P3484 code.
After verifying the code with an OBD-II scanner, a mechanic should first perform a visual inspection of all the electrical components. Any loose, corroded, short, or damaged components should be repaired or replaced as necessary. The code should then be cleared from the PCM, and the system should be retested. If the code returns to the PCM, the mechanic should then proceed to test each potentially faulty component until the proper diagnosis is found.
This code represents an issue that should be dealt with immediately. The fault that causes the P3484 code can quickly create larger issues that will require more expensive repairs in the future.
Repairs that may be performed to fix the P3484 code include:
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