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P3469 is a diagnostic trouble code (DTC) for "Cylinder 9 Exhaust Valve Control Malfunction". 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.
P3469 is the fault code for Cyl9 Exhaust Valve Ctrl Circ/Open. Cyl9 specifies that the issue is likely taking place in engine cylinder number 9. Other 3400 series codes may also be set.
Each engine cylinder has valves which deliver fuel to the engine and carry the resulting vapors away. These valves are controlled by the ECM (engine control module) which not only tells them when to open and close, but closely monitors the timing of these actions. If there is an abnormality in the signal sent to the ECM by the exhaust valve mechanism, the ECM then detects a problem in the circuit and the vehicle sets an exhaust valve control code.
Potential causes of an exhaust valve circuit fault include:
A short or damage to the solenoid wiring
A loose exhaust valve solenoid connector
A bad exhaust valve control solenoid
Low oil pressure caused by low oil levels
Restricted oil passages
A maladjusted timing chain or belt
A camshaft actuator fault
Rarely, this problem may be caused by a faulty PCM or ECM, but other causes should be investigated before replacing these expensive parts.
An exhaust valve fault may trigger an illuminated Check Engine light, as well as sluggish acceleration and poor fuel economy. The variable valve timing system will likely be disabled if the vehicle sets an exhaust valve control circuit malfunction code.
You or a technician should carry out the manufacturer’s pinpoint diagnostic procedure. These steps may include:
Hooking the vehicle up to an OBD-II scanner to verify the code and record data about the timing, frequency, and order in which any set codes occurred
Diagnosis and repair of any concurrent codes, in the order in which they happened
Clearing the codes and retesting the vehicle to see if they return
An exhaust valve control circuit malfunction is not as serious as some other codes, and the vehicle won’t likely be completely disabled, but it is still important to have the problem assessed and repaired as soon as possible. The reduced power that can occur with this code may put you in danger if you must make a sudden maneuver.
Fixing this fault may require one or more of the following:
Replacement of the exhaust valve solenoid
Replacement of valve lifters
The engine, cylinders, and valves are parts of a complex network of moving parts which can be complicated to diagnose and repair. In addition, special tools may be required to test the voltage and resistance of the sensors and circuitry. If you don’t have the proper equipment to carry out a full inspection and diagnosis, you may want to consult a professional who can make your repair faster, easier, and more efficient.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.