Guide To P3451 OBD Error Code Solutions

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Do you know how the P3451 error gets stored? Keep reading ahead. Cylinder deactivation system is utilized by many manufacturers in order to fulfill the fuel and emission standards. PCM has the ability to disable the particular cylinder when additional power is not expected from the engine like idling condition or during highway cruising. If the intake valve for cylinder #8 does not turn on or off as needed, the PCM will find this and it will store the P3451 error code in the vehicle

The goal of the #7 cylinder deactivation /intake valve control circuit is to allow the cylinder deactivation feature to raise fuel economy when load operation is light such as highway driving. The 4 or 8 cylinder mode is operated by the ECM which will engage the intake deactivating solenoids for 4 engine cylinders. 3 of the cylinders in this process is found by the engine configuration and firing order of the cylinder and this code refers to #7 cylinder. You will find the #1 cylinder deactivation solenoid located near the intake in the vicinity of the cylinder subject to the specific vehicle configuration.

What causes this problem with the Cylinder 7 Deactivation/Intake Valve Control Circuit Low?

• Defective cylinder deactivation solenoid.
• Cylinder deactivation solenoid harness might have an opening or short circuit.
• Cylinder deactivation solenoid circuit might have a weak electrical circuit.
• Blocked oil passage.
• Oil pressure might be less.

1. Engine Control Module - Performance issue may arise in your vehicle if the ECM is defective. Replace the defective ECM by shopping for a new one from PartsAvatar.
2. Powertrain Control Module - Illumination of the check engine light is a common symptom of faulty PCM. Change it immediately.
3. Intake Valve - A faulty intake valve has to be replaced immediately if you want to avoid the P3451 error code.
4. Exhaust Valve - Is the engine performance poor? Then the exhaust valve can be faulty. Replace them as soon as possible.
5. Oil Pressure Gauge - A broken or faulty oil pressure gauge needs to be changed soon so you can avoid P3451 error code in your vehicle.
6. Valve Timing Solenoid - Doe the engine light blink very often? Then the valve timing solenoid can be damaged. Change it as soon as possible to avoid the P3451 error.

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P3451 here:

Common Symptoms

• Signs of misfiring.
• Fuel consumption might be increased.
• The service engine warning light or else the engine light will stay on.
• Weak performance by the engine

Here are some ways with the help of which you will be able to correct the OBD Code P3451

• Changing the oil as well as the filter.
• Defective deactivation solenoid needs to be repaired and fixed.
• Cleaning the oil passage that has blocks
• Clearing the rusty connectors.
• Changing the defective wires.
• Replacement of the faulty PCM.

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have high-grade ECM, PCM, intake valve, exhaust valve, oil pressure gauge, valve timing solenoid and a lot more for our precious customers.

If you want to easily diagnose this fault code P3451, then all you have to do is to follow the steps which are mentioned below:

Fluid & Wiring Inspections

• Start with the help of a troubleshooting procedure, and check for the correct Technical Service Bulletins (TSB's) specifically designed for your vehicle by year, model and transmission.
• You can save enough time in the long run as it guides you in the right path.
• The circuit will include several parts like the cylinder 5 exhaust valve control circuit depending on the particular vehicle.
• Now, perform a visual inspection of the wires for injuries like scraping, rubbing, or burn spots.
• Check for the connector as well as its connection if they are properly secured and if there is any corrosion or damaged pins.
• You may also have to visually examine the connectors and its associated connections for protection, erosion and damaged pins.
• In this process, you must inspect all the wires and its connections to components which also contains the ECM.
• Validate the configuration of the cylinder 1 exhaust valve control circuit by verifying the particular tech data and make sure that every part is included in the circuit which may also contain the fuse or a fuse-able link in some applications. 

Advanced Steps

• The advanced step for each and every vehicle is specific and it needs suitable tools to accomplish diagnosis correctly.
• The process will need a digital multimeter and certain technical references for your vehicle. The requirement of voltage will differ based on particular models of your vehicle.
• So it’s always best to track specific troubleshooting chart.

Voltage Checks

• The need for reference voltage and acceptable range will vary based on the specific model of your vehicle.
• You have to inspect your vehicle for continuity by removing the power and the readings of the connections should be set to 0 ohms or as stated by the manufacturer.
• Suppose there is no resistance or continuity, then it clearly shows that the wires are defective or there is opening or shorted wire which needs to be fixed.

Common mistakes when diagnosing the P3451 code

• Faulty powertrain control module.
• Troublesome electrical wires.
• The level of the engine oil is less.
• Variable valve timing solenoid might be faulty