Guide To P3459 OBD Error Code Solutions

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Cylinder deactivation system is used by most of the manufacturers to meet the fuel and emission standards. PCM can disable the particular cylinder when extra power is not needed 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 identify it and the error will be stored.

The aim of the #8 cylinder deactivation /intake valve control circuit is to permit the cylinder deactivation feature to increase fuel economy when load operation is light like highway driving. The 4 or 8 cylinder mode is operated by the ECM which engages the intake deactivating solenoids for 4 engine cylinders. 3 cylinders in this procedure is identified by the engine configuration and firing order of the cylinder and this code refers to #8 cylinder. You will find the #1 cylinder deactivation solenoid near the intake in the vicinity of the cylinder depending on the specific vehicle configuration.

What causes this problem with the Cylinder 8 Deactivation/Intake Valve Control Circuit Low?

• The cylinder deactivation solenoid might be broken.
• The cylinder deactivation solenoid harness might either be shorted or you might see an opening in the circuit.
• The very poor electrical connection in the cylinder deactivation solenoid circuit.
• Controlled oil passage.
• The oil pressure will be low.

1. Engine Control Module - Conditions of misfire indicates that the ECM is faulty which needs replacement as soon as possible.
2. Powertrain Control Module - Does your engine turn off without any reason? Then it’s a high time to replace your PCM as it can be faulty.
3. Intake Valve - The intake valve has to be damage and defective free so that you can avoid P3459 error code from being stored in your vehicle.
4. Exhaust Valve - Conditions of misfire indicates a damaged exhaust valve. Replace them quickly to avoid further system malfunctioning.
5. Oil Pressure Gauge - Carefully inspect the oil pressure gauge if they are broken or damaged. Replace them soon if they are found to be defective.
6. Valve Timing Solenoid - Illumination of the check engine light is a sign of faulty valve timing solenoid. Replace it to avoid the P3459 error.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P3459 code by mentioning some major symptoms below:

Common Symptoms

• Fuel consumption might be high.
• Low engine performance.
• Indications of a misfire.
• You will notice either of the lights, that is the engine light or the warning light of the service engine turned on.

Learn the ways with which you can correct this trouble code:

• Replacement of both the oil and filter.
• Faulty variable valve timing solenoid has to be made alright.
• In order to clear the oil passage, the blocks must be removed.
• The connectors which have corrosion must be cleaned.
• Fixing the faulty wires.
• Substituting or flashing the defective ECM

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of PCM, intake valve, engine misfire, exhaust valve, ECM, oil pressure gauge and a lot more. We are sure that now all your issues would be resolved.

Here are some steps which you should follow in order to diagnose this fault code P3459:

• As a primary step for any failure, you must check the TSB which is specific to your vehicle by year, model and power plant. This can help in saving a lot of timing by guiding you on the right path.
• The next step is to check the engine oil condition and make sure it is serviced to the correct level.
• Find out every component that is linked with the cylinder 8 deactivation intake valve control circuit and look for possible damages.
• Depending on your vehicle, the circuit may include several other components like deactivation solenoid, switches, fault indicators, and the ECM.
• Carefully check the linked wires for any damages like scraping, rubbing, bare wires or burnt wires.
• Secondly, inspect the connectors as well as the connections for proper security, erosion and defective pins.
• This process must contain every wire and the components which also includes the ECM.
• You can always check the particular data of the vehicle to confirm the configuration of the cylinder 8 deactivation/intake valve control circuit and make sure that every component is incorporated within the circuit which also has a fuse and fuse-able link in a few applications.

Advanced steps

• The advanced step for each vehicle varies and needs the proper tools to perform correctly.
• The process needs a digital multimeter and particular technical references for your vehicle.

Voltage Check

• A requirement of the reference voltage and acceptable ranges will vary depending on specific models of your vehicle as well as the configuration.
• The technical data which is specific contains the troubleshooting charts and the appropriate order in order to assist you with the right diagnosis.
• While inspecting, if you don’t find the power source or ground, you have to check the integrity of the wires, connectors, and other components by carrying out a continuity test.
• Remove the power from the circuit and carry out the continuity test and the correct reading for the wires and connections must be 0 ohms resistance.
• If you don’t find resistance or continuity, then the wires might be open, shorted or eroded which must be changed.

Common mistakes when diagnosing the P3459 code

• PCM might be broken.
• Problematic wires.
• Engine oil level is decreased.
• Faulty variable valve timing solenoid.