P3452 - OBD Trouble Code

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If you are looking for information with regards to the P3452 error code, then you are at the right place. Keep reading further. Many manufacturers are using cylinder deactivation system to meet the fuel and emission standards as it allows to disable the selected cylinder when extra power is not required. If the PCM finds out that the intake valve for #7 cylinder is not working as needed, then the P3452 error will be set.

To improvise the fuel economy when the operation is light like highway driving, the aim of the cylinder 7 deactivation/intake valve control circuit is to permit the cylinder deactivation feature. The 4 or 8 cylinders is controlled by the ECM by involving the intake deactivating solenoids for 4 engine cylinders. This error refers to #7 cylinder and remaining 3 cylinders are identified by engine configuration and cylinder’s firing order. #1cylinder deactivation solenoid is fixed near the intake or in the vicinity of the cylinder depending on specific vehicle configuration.

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

• Damaged cylinder deactivation solenoid.
• There might be an opening or the cylinder deactivation solenoid harness might have a short circuit.
• The electrical connection of the cylinder deactivation solenoid circuit might be weak.
• The oil passage may be restricted.
• Oil pressure might be minimum

1. Engine Control Module - The engine performance will be poor and there will be a drop in fuel economy if the ECU malfunctions. Replace it immediately.
2. Powertrain Control Module - The engine will fail to start or the fuel economy will be poor if the powertrain control module is faulty. Get them replaced by getting a new one from PartsAvatar as soon as possible.
3. Intake Valve - A damaged intake valve needs immediate fixation to avoid the P3452 error code.Get the right replacement from PartsAvatar at an affordable cost.
4. Exhaust Valve - Poor performance by the engine is a sign of faulty exhaust valve. Quickly replace it to avoid further troubles.
5. Oil Pressure Gauge - This is a common fault which appears in the vehicle if the oil pressure gauge is broken or damaged. Fix them as soon as possible.
6. Valve Timing Solenoid - The valve timing solenoid can turn out to be defective if there is a decrease in fuel economy. Alter them as soon as possible to avoid further malfunctioning

It is vital 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 P3452 here:

Common Symptoms

• Possible indications of misfiring.
• Fuel consumption is high.
• The warning light of the service engine or the engine light might be flashing.
• Performance by the engine seems to be weak.

Want to correct the Trouble Code P3452? Read these points mentioned below:

• You have to change the oil and filter.
• Defective deactivation solenoid needs reparation.
• Clearing the connectors which have rust.
• Changing the wires.
• Replacement of the PCM.
• The blocked oil passage must be cleaned.

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

Fluid & Wiring Inspections

• Before you start the troubleshooting procedure, check for the correct Technical Service Bulletins (TSB's) which is specific for your vehicle by year, model and transmission.
• It can actually help you in saving time in the long run by guiding you in the right path.
• There might be several components included depending on the specific vehicle which includes the variable valve timing solenoid, switches, fault indicators, and the ECM.
• Now, perform a careful inspection of the wires for damages like scraping, rubbing, or burn spots.
• Also, you have to visually check the connectors and its connections for protection, erosion and damaged pins which includes the including the PCM.
• Always refer the tech data of the vehicle to check the alignment of the cylinder 1 exhaust valve control circuit. and make sure that every part is included within the circuit which also contains the fuse or a fuse-able link in certain applications.

Advanced Steps

• The advanced procedure varies for every vehicle as they are specific and need proper diagnostic tools to carry out the diagnosis.
• Use a digital multimeter and appropriate technical references for your vehicle to start the process. Use your vehicle specific troubleshooting chart as it is always the best idea.
•  Depending on your vehicle, the voltage requirements will change.
• Requirements for fluid pressure will also change based on transmission design and configuration.

Voltage Checks

• Based on the specific vehicle and configuration of the circuit, both the reference voltage and acceptable range will change the troubleshooting charts and the appropriate sequence are included in the specific technical data to help with the proper diagnostic procedure.
• If it is not specified in the technical data, the normal readings of the connections for wires should be set to 0 ohms or as preferred by the manufacturer.
• Remove the power and check for continuity so there is no further damage and short circuit can be avoided.
• 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 P3452 code

• PCM might be defective.
• Problem with the electrical wires.
• The level of engine oil seems to be low.
• Variable valve timing solenoid might be defective.