P099A - OBD Trouble Code

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How does this error code occur? What are the symptoms and causes? This is a general type of error code which takes place in the vehicle if the transmission fails to shift. In order to engage with the clutch in the transmission, the transmission fluid pressure solenoid will allow either the TCM or the ECM to use hydraulic fluid so that as you drive, the engine will shift smoothly. If there is an issue with the electrical circuit or with the solenoid, then the P099A error code will be stored.

In order to determine the richness of fuel or air in the cylinder, the oxygen sensor will measure the quantity of oxygen in the exhaust. If you enhance this mixture, the fuel economy will be less where the emission from the exhaust will be even lower. This description can perfectly help you when you see the P099A error code in the vehicle.

What causes this problem with the Shift Solenoid "G" Control Circuit Range/Performance?

• Shift solenoid ‘G’ is damaged.
• You will find an opening or the shift solenoid ‘G’ circuit will be short.
• The electrical connection of the shift solenoid ‘G’ is bad.

1. Transmission Shift Solenoid – A proper functioning of the transmission shift solenoid is necessary to avoid P099A error code.
2. Shift Solenoid Valve – Is this component broken or damaged? Find a new replacement for the shift solenoid valve from Parts Avatar.
3. Transmission Control Module – The TCM has to be damage free so that you can avoid system malfunctioning.
4. Powertrain Control Module – Replacing this defective component can help your system function normally.
5. Engine Control Module – A faulty or broken ECM needs quick replacement so that you can skip P099A error code.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P099A code by mentioning some major symptoms below:

Common Symptoms

• Fuel consumption by the engine is more.
• The transmission will refuse to shift properly.
• Engine light will remain turned on.

Have a look at some ways with which you can correct the P099A code:

The ECM or the PCM in union with the engine system will initiate the P099A error code in the solenoid valve so that it can control the amount of oil pressure which is sent to engine mechanism that is connected to valve system so you can switch between high and low valve timing. If there is an opening or short circuit in the solenoid, then the error code will be stored.

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 transmission shift solenoid, shift solenoid valve, transmission control module, powertrain control module, engine control module, transmission fluid 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 P099A fault code:

• As an initial step, the mechanic will carefully inspect the vehicle with the help of a scanner.
• After this, the technician will connect a scanner to the diagnostic code so that he can recover all the codes and freeze frame data.
• Note down this information as it can clearly help for further diagnosis.
• The mechanic will also inspect the shift solenoid to find if it is disconnected or if any other faults persist.
• After careful inspection, he will reset the code and test drive your vehicle to check for the reappearance of the codes.
• He will know that an intermittent condition persists if the code does not return instantly.
• But if the error code returns quickly, the vehicle is test driven, and then he has to inspect the transmission fluid.
• The transmission fluid can be dirty or there can be any blocks in the transmission filter which can be replaced instantly.
• At times, the fluid level will be insufficient which has to be fixed immediately. If he comes across any leaky areas, he will fix them too.
• Once the fluid is checked for the appropriate level, then every other component like wires and connectors have to be checked for possible damages.
• If any of the components are damaged, the mechanic will replace them quickly.
• In this scenario, the error code mostly arises due to a dirty transmission fluid where it can also be contaminated or the shift solenoid is broken.
• Most often, whenever the mechanic carries out any repair work, he will reset the code and test drive your car, to check if the codes return immediately. This can preferably help the mechanic to know what caused this error code in the vehicle.

Common Mistakes When Diagnosing the P099A Code

• Faulty TCM.
• Level of fluid in the transmission is low.
• Faulty transmission shift solenoid.
• Electrical wires have issues.