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P3471 is a diagnostic trouble code (DTC) for "Cylinder 9 Exhaust Valve Control Circuit Low". 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 P3471 code indicates that the PCM has detected a voltage reading from the cylinder 9 exhaust valve control circuit that is too low in comparison to the manufacturer’s specifications. Like the P3469 code, this code may be found alongside other 3400 series codes.
In order to expel fuel vapors from the engine, each cylinder has valves that are controlled by the ECM. The function and timing of these valves are monitored closely, and any abnormality in the performance results in a signal being sent to the PCM. If the PCM sets the P3471 code, it means that the voltage reading from cylinder 9’s exhaust valve circuit was too low.
There are several causes that could be behind the P3471 code. They include:
In addition to the illumination of the Check Engine Light, the vehicle may run sluggishly, and the fuel economy may decrease.
After an OBD-II scanner detects the P3471 code, the technician should repair any faulty electrical components first. These are common faults behind the P3471 code, and should not be overlooked. After this, and any subsequent repair, the code should be cleared from the system, and the system should be retested.
If the code returns to the PCM, the mechanic should test the exhaust valve control solenoid and sensor, and follow any procedures necessary to test all potentially faulty components until the cause is found.
While this code will not affect the immediate drivability of the vehicle, it can create an unsafe driving condition should the driver need a lot of engine power to make sudden maneuvers or pull heavy loads. This code should be addressed as soon as possible to ensure that no further damage is done to any components within the exhaust valve circuit.
There are many ways that a technician can address a P3471 code detection. They include:
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