P3484 code definition
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.
What the P3484 code means
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.
What causes the P3484 code?
There are quite a few things that can cause the P3484 code. Those include:
- Low oil pressure
- Faulty cylinder deactivation solenoid
- Faulty electrical components within the cylinder deactivation solenoid circuit
- Restricted oil passage
- Fault within the engine mechanical condition
What are the symptoms of the P3484 code?
In most cases, only the illuminated Check Engine Light will be present with the P3484 code.
How does a mechanic diagnose 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.
How serious is the P3484 code?
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.
What repairs can fix the P3484 code?
Repairs that may be performed to fix the P3484 code include:
- Replace a faulty cylinder deactivation solenoid.
- Replace faulty electrical components within the cylinder deactivation solenoid circuit.
- Clear any restrictions in the oil passage.
- Repair any faults within the engine mechanical condition.
Need help with a P3484 code?
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