P3494 OBD Error Code: Problem & Solutions

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The trouble code P3494 can be defined as Cylinder 12 Exhaust Valve Control Circuit Performance. The latest automobiles with eight or more cylinders are generally equipped with a feature which allows half of the engine cylinders to shut down when they’re not required like times of light load operating conditions. A lot of components like mass airflow sensor (MAF) - send data to the ECM (engine control module) – informing it of the operating conditions so that it can signal cylinders to turn on and off depending upon when they are required.

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 12 exhaust valve control circuit would not be as per the specifications set by the manufacturer. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile.

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

• Issues in the variable valve timing solenoid
• Faulty wiring
• Malfunctioning connector
• There can be inoperative ECM/PCM
• Some issues related to the valve lifter
• The engine oil level might be less

1. Exhaust Gas Recirculation Valve - Are you facing some engine performance issues? If there are some flaws in the EGR valve, then it would disrupt the automobile’s air fuel ratio which would ultimately cause engine performance problems like decrease in power, reduction in fuel efficiency as well as issues related to acceleration. Replace it as soon as possible.
2. Throttle Position Sensor - Are you experiencing sudden idle surges and sudden hesitation while accelerating? Then these are the symptoms of defective throttle position sensor. Get it checked and replace if needed.
3. Engine Control Module - There can be some engine performance issues due to faulty engine control module. If the ECM fails or has any problems it can lead to performance issues with the vehicle like misfires, hesitation, loss of power, and sometimes even decreased fuel economy.
4. Powertrain Control Module - PCM stands for powertrain control module. It is a car part, a control unit which is utilized on motor vehicles. It is generally a combined control unit, consisting of the engine control unit (ECU) and the transmission control unit (TCU).
5. Manifold Absolute Pressure Sensor - The MAP sensor would fail by getting clogged, contaminated, or sometimes damaged. There can be times when the engine heat would “overcook” the electronics of the MAP sensor and can cause cracks vacuum lines. So it is very important to take proper care of the MAP sensor and in case you need a new one, then Parts Avatar is here at your service.
6. Electronic Control Unit - If your automobile's check engine light remains on constantly, and never goes off, there's a good chance that your vehicle has a damaged electronic control unit. There are a lot of reasons why a car's check engine light will remain on. The most common reason is a defective ECU.
7. Diagnostic Tools - It is always advisable to use the correct tools and equipment while resolving any OBD code issue as even small mistakes can lead to wrong diagnosis. Thus, always take help from a professional who has the knowledge and experience to such tools in an efficient manner. Buy new quality diagnostic tools from us today!

Our main motive is to achieve customer satisfaction as for us our customers are everything and that’s why we will help you to diagnose P3494 code by mentioning some major symptoms below:

Common Symptoms

• The service engine soon light can start lighting up
• Declining fuel efficiency
• Car engine might start misfiring
• Illumination of the check engine light
• Inferior engine performance

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 P3494:

• You must clean the blockages in the oil passageways
• Repair or replace the quirky valve lifter
• Rehabilitate the defaults in the MAP
• Carefully adjust the faults in the TP sensors
• The MAF should be restored to working order
• Recondition the non-functioning deactivation solenoid
• Adjust the flawed wiring or connectors

However, if you face any issue then we have stocked a wide range of best priced camshaft, 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 more to help you out in fixing your car.

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

• This is a general type of error code which is diagnosed with the help of a scanner.
• The mechanic will insert a scanner to diagnostic port of the vehicle and recover the codes and freeze frame data.
• If he happens to find any additional error codes, he has to address them as well.
• Once it is done, he has to reset the vehicle, and then test drive to see if the error code appears.
• If the error code does not return, then there can be an erratic condition.
• Then the mechanic has to check the wires, connectors and other electrical components and quickly replace them if he finds them to be damaged or defective.
• Inspect the oil pressure, level, and condition.
• Check for the damaged sensors and its components for error. It the mechanic finds the fault in the wiring and connectors, then replace them immediately. The oil passageways for blockages from debris or sludge or the valve lifters.
• Also check for the particular battery cells emitting high voltages and thus might need battery replacement as well.
• Parts or components should not be replaced with reference to only a P3494 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.
• If all the components seems to work perfectly, inspect the PCM for faults and replacement along with reprogramming.

Common Mistakes When Diagnosing The P3494 Code

• Non performance of the PCM
• There might be very less engine oil level
• Failure in the car wiring
• The variable valve timing solenoid might not function properly