Guide To P099D OBD Error Code Solutions

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How does this error code take place in the vehicle? What does P099D refer to? How to diagnose this error code? Do these questions pop up? Then you are in the right place. If any problem arises in the electrical circuit, the powertrain control module or the transmission control module will identify it and store this error code in the system.

The main function of the transmission fluid pressure solenoid is to allow the ECM or the TCM to use the hydraulic fluid. This hydraulic fluid will generally help to shift smoothly as you keep driving.

The amount of oxygen in the exhaust is generally measured by the oxygen sensor so as to identify the quantity and ratio of air and fuel that is present in the cylinder. Enhancing this mixture will make the fuel economy better and the emission from the exhaust will also be less.

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

• Shift solenoid ‘H’ is broken.
• The shift solenoid ‘H’ circuit is open. At times you will find the circuit to be shorted.
• The shift solenoid ‘H’ has reduced electrical connection.

1. Transmission Shift Solenoid – Carefully inspect if this component is broken or damaged. If it’s damaged replace it immediately.
2. Shift Solenoid Valve – Check if your shift solenoid valve is similar to your manufacturer’s specification. If not so, you can get them easily at Parts Avatar
3. Transmission Control Module – Is your TCM faulty? Is it broken? Quickly replace with new TCM from Parts Avatar.
4. Powertrain Control Module – This is one of the common cause for failure in the system. Repairing this component can help you to get rid of the P099D error.
5. Engine Control Module – Any error in the engine control module has to be checked and if the part is damaged replace them to avoid P099D error.

For us our customers are everything, and that’s why we will help you to diagnose P099D code by mentioning some important symptoms below:

Common Symptoms:

• Consumption of fuel is more by the engine.
• Reduced transmission shift by the vehicle.
• The vehicle’s engine light would be turned.

After you know the symptoms of your vehicle’s problem, it becomes easy to detect it and get started with solving it. So, next on our list is a few common steps to correct this issue with your vehicles.

• The engine control module or the powertrain control module along with the engine system will initiate the P099D code. In order to control the oil pressure to the engine mechanism, this P099D code is activated. The switching of valve timing between high and low is performed by the engine mechanism that is inserted in the valve system. If the mechanic happens to see any open or short circuit, then this P099D error code will be stored.
• To do all this, you will need a few high-quality auto parts such as transmission shift solenoid, shift solenoid valve, transmission control module, powertrain control module, engine control module, transmission fluid and so on. From where will you get them? From your local store? Well, why go there when you can order quality parts with us while sitting in the comfort of your home. So, just browse through our website and order your needed parts today.

Here are some steps which you should follow in order to diagnose this P099D fault code:

• The mechanic or the technician will use a diagnostic scanner or code reader like DVOM to visually scan for the error codes in the vehicle.
• After performing a careful inspection, every of the stored codes and freeze frame data is retrieved as it can help down the way for further diagnosis process.
• Most often he has to inspect the solenoid itself to see if they are faulty or damaged. Additional error codes that are stored in the vehicle are also addressed.
• The mechanic performs a continuity test between the PCM and solenoid to check the resistance.
• If the solenoid or the control modules are not faulty, he will then retune the code and test drive the vehicle.
• On test driving, if the P099D code does not return soon, he will know that an erratic condition exists.
• But if the error returns instantaneously, he will check every component of the control module as well as the circuit like connectors, wires, harness, fuses etc for any possible fault.
• If any component is damaged, he will fix them right away.
• After performing this repair, he will inspect the transmission fluid as well as its level.
• If the level is below the manufacturer’s specification, it has to be refilled and if the fluid is murky or contaminated it needs to be replaced.
• Every time a repair work is carried out, make sure that the mechanic test drives the vehicle after every repair so that the diagnosis is successful. This can eventually help him to know as to where the error occurred.

Common Mistakes When Diagnosing the P099D Code

• The improper functioning of the transmission control module.
• The liquid level is low in the transmission.
• Problem with the electrical wires.
• Transmission shift solenoid has some defects.