Error Code P3493: What It Means & What To Do?

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The trouble code P3493 can be defined as Cylinder 12 Exhaust Valve Control Circuit/Open. There are a number of fuel and emissions standards, so in an effort to meet that lot of manufacturers are using the cylinder deactivation systems. This system would allow the engine control module (PCM) to disable select cylinders when additional power is not required from the engine, such as at idle or when cruising on the highway. The cylinder 12 exhaust valve control circuit is being monitored by the engine control module. This trouble code would be set by the ECM when the Cylinder 10 deactivation/intake valve control circuit would not be as per the specifications set by the manufacturer.

This error code would indicate that there is an issue with the exhaust valve on cylinder number 12. It is the engine control module which would tell these valves when to open and close, in order to carry exhaust vapors away from the engine after the fuel has been utilized. Now when this valve would fail to open at the right time, then the ECM would detect that the signal being received would fall outside of the expected parameters, and then the automobile would set this fault code as well as another cylinder exhaust valve associated code.

What causes this problem with the Cylinder 12 Exhaust Valve Control Circuit/Open?

• Quirky exhaust valve control solenoid
• Malfunctioning connection
• The valve control solenoid wiring might be opened or shorted
• The oil passage might be restricted
• here level of oil might be very low
• Unusable engine
• Flaws in the camshaft actuator
• There can be distorted connector

1. Mass Air Flow Sensor - A faulty mass airflow sensor will cause problems similar to low compression or low vacuum, and will also show symptoms similar to when your vehicle has low fuel pressure from a faulty fuel pump. Thus, replace damaged/faulty MAF sensor today!
2. Throttle Position Sensor - Is there a sudden bucking as well as jerking in your automobile. Then in that case there is surely some fault in the throttle position sensor. Buy top notch throttle position sensor from us at economical prices.
3. Engine Control Module - It is not always the components, but the ECM that can also be faulty. It can cause misinterpretation of correct data thus leading to wrong operational decisions which will affect the transmission and overall engine performance. Thus, replace faulty module and reprogram it now!
4. Exhaust Gas Recirculation Valve - It is auto part commonly found on many road going automobiles. It is a part of the vehicle’s exhaust gas recirculation (EGR) system, an emissions system that is designed to recirculate exhaust gases back into the vehicle’s intake so that it can reduce cylinder temperatures and NOx emissions. Purchase top notch exhaust gas recirculation valve from us at economical prices.
5. Manifold Absolute Pressure Sensor - A quirky manifold absolute pressure (MAP) sensor can upset fuel delivery as well as the ignition timing. Some performance problems can also arise like poor fuel economy, lack of engine power and sometimes the car won’t start at all. Find top quality manifold absolute pressure sensor online.
6. Powertrain Control Module - Powertrain Control Module can also be faulty in rare cases and thus needs through checks for system and software errors. Thus check and replace it, if required.
7. Electronic Control Unit - The ECU manages the cooling system to control the battery operating temperatures and thus must be replaced if found faulty. Thus, buy new ECU modules and components from us!
8. Diagnostic Tool - Make use of quality diagnostic tools to resolve any OBD error code. Buy quality diagnostic tools from us!

Willing to know some common symptoms of OBD Trouble Code P3493? Your wish is our demand. Have a look at them below:

Common Symptoms

• Visibility in the check engine light
• Bad engine performance
• Decreasing fuel efficiency
• Car engine might start misfiring
• Illumination of the service engine soon light

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P3493:

• It is essential to clear the oil passageways
• Rehabilitate the defaults in the timing and/or camshaft actuator
• The malfunctioning mass airflow sensor should be repaired or replaced as per the need
• Carefully adjust the faults in the wiring or connectors
• The exhaust valve solenoid should be restored to working order
• Recondition the non-functioning manifold absolute pressure
• It is necessary to perform proper service of the unsound throttle position sensor
• Adjust the flawed valve lifter

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have high grade camshaft actuator, mass air flow sensor, throttle position sensor, powertrain control module, engine control module, manifold absolute pressure, exhaust valve control solenoid, valve lifter oil manifold, maf sensor, map sensor, pcm car, ecm car, body control module, pcm module, ecm module, throttle body sensor and a lot more for our precious customers.

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

A technician begins by hooking the vehicle to an OBD-II scanner to verify that the code is present, and check for other codes. The freeze frame data along with current data is recorded, and the codes are then cleared to see if they reoccur.

After that the next step is to inspect the condition of the engine oil and then confirm it is serviced to the appropriate level. After that all the components which are related with the Cylinder 12 Exhaust Valve Control Circuit should be located and then search for obvious physical damage. It all depends upon the particular vehicle and this circuit may incorporate several components including the deactivation solenoid, switches, fault indicators and the ECM. A proper visual inspection should be performed to inspect the related wiring for obvious defects such as scraping, rubbing, bare wires, or burn spots.

Then examine the connectors and connections for security, corrosion and faulty pins. This process should include all wiring connectors and connections to all constituents including the engine control module. You can always consult the particular tech data for the automobile to check the configuration of the Cylinder 12 Exhaust Valve Control Circuit and confirm every component incorporated within the circuit which may include a fuse or a fuse-able link.

Fluid & Wiring Inspections

• The first step is to make sure the fluid level is correct and inspect the condition of the fluid for contamination.
• After that perform visual inspection to check the associated wiring for obvious defects such as scraping, rubbing, bare wires, or burn spots should be performed.
• Next is to check the connectors and connections for security, corrosion and damaged pins. This process must include all wiring and connectors to the transmission solenoids, transmission pump and the PCM.
• It depends upon the configuration; the transmission linkage should be inspected for security and binding issues.

Advanced Steps

• The advanced steps become very vehicle specific and require the appropriate advanced equipment to perform accurately.
• These procedures require a digital multimeter and the specific technical references for the vehicle.
• Voltage requirements will vary based on the specific year and model of the vehicle.
• You should follow the specific troubleshooting chart for your vehicle.

Continuity Checks

• Continuity checks should always be performed with the power removed from the circuit and the normal readings for wiring and connections should be 0 ohms of resistance unless otherwise specified by the technical data.
• Resistance or no continuity is an indication of faulty wiring that is open or shorted and must be repaired or replaced.

Common Mistakes When Diagnosing The P3493 Code

• Some issues related to the powertrain control module
• Failure in the variable valve timing solenoid
• The engine oil level might be very low
• Issues related to the wiring