Error Code P099B: What It Means & What To Do?

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When will the control circuit of shift solenoid G be low? What are the symptoms of this error code? The operation of the shift solenoid signal is investigated by the transmission control module (TCM). This error code will be set in the system if the shift solenoid does not meet the factory expectations as specified by the manufacturer.

Do you know what does control circuit low mean? If the transmission refuses to shift properly then you will find this error code in your vehicle. By using the hydraulic fluid, the transmission fluid pressure will allow either the powertrain control module or the engine control module to involve the clutch in the transmission so that as you drive slowly, you will see the smooth shifting of the transmission. The powertrain or the engine control module will set an error if there is a problem in the electrical circuit.

What causes this problem with the Shift Solenoid "G" Control Circuit Low?

• Defective Shift solenoid ‘G’.
• There is an opening or the circuit is shorted in the shift solenoid ‘G’.
• The electrical connection appears to be less in the shift solenoid ‘G’.

1. Transmission Shift Solenoid - A faulty transmission shift solenoid needs an immediate replacement for the system to function normally.
2. Shift Solenoid Valve - Visually inspect this component. If you find them damaged then replace with a new shift solenoid valve from Parts Avatar.
3. Transmission Control Module - A faulty TCM needs to be replaced quickly so that you can skip P099B error code.
4. Powertrain Control Module - Do you find this component to be broken or damaged? Fix the issue soon.
5. Engine Control Module - A defective ECM should be changed immediately to avoid P099B error code.

We at Parts Avatar Canada care for our customers, and that’s why we will help you to diagnose P099B code by listing out some major symptoms. They are mentioned below as follows:

Common Symptoms

• Higher fuel consumption.
• Improper shift by the transmission.
• Engine light keeps flashing.

Learn the ways with which you can correct this P099B trouble code:

The solenoid valve – P099B is triggered by the engine system in combination with the powertrain control module as well as the engine control module. In order to switch the valve timing between high and low, the P099B code is started so that it will operate the oil pressure to the engine mechanism that is connected to the valve system. If there is an error in the shift solenoid valve then the error code will be stored.

However, if you face any issue then we have stocked a wide range of best-priced transmission shift solenoid, shift solenoid valve, transmission control module, powertrain control module, engine control module, transmission fluid and more to help you out in fixing your car.

Here are some steps which you should follow in order to diagnose this P099B fault code:

• A careful inspection of the vehicle is carried out by the mechanic with the help of a scanner.
• After this inspection, he will recover every stored code in the vehicle as well as freeze frame data by inserting a scanner to the diagnostic port of the vehicle.
• He will store this information as it may help him with further diagnosis.
• After the codes are recovered, the vehicle is reset, test- driven to check for the occurrence of the error code.
• He will clearly know that an erratic condition has prevailed if the code does not return quickly.
• But if the code returns instantly, he will then start inspecting the transmission fluid for any leaks.
• In some cases, the transmission fluid can be dirty or it can be contaminated.
• The area of the leak will be found and fixed. The dirty or contaminated fluid should be replaced with clear fluid.
• Sometimes the fluid may be not be filled at the correct level, which the mechanic will find during diagnosis. Sometimes, the solenoid itself can be defective which has to be checked for any damages.
• After this, the technician will visually inspect every wire, connectors, harness and fuses for any possible damages or defective and repairs them as needed.
• You must always know that once the error code is repaired, it is always the best idea to test drive and check the vehicle if the error code appears again which can help the technician to know the area of fault and as to how the error code occurred in the vehicle.
• This can easily help the mechanic to fix the error code.

Common Mistakes When Diagnosing the P099B Code

• TCM is broken.
• Fluid level in transmission is less.
• Damaged transmission fluid pressure sensor.
• Problem with electrical wires.