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P0990 is a diagnostic trouble code (DTC) for "Transmission Fluid Pressure Sensor/Switch E Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P0990 code is a generic powertrain code related to the transmission, including pressure faults and sensor failures. In this case, the transmission control module has received a higher than normal voltage signal from the transmission fluid pressure sensor/switch E.
A vehicle uses the transmission fluid pressure sensor to assist with changing gears. Adaptive shifts are controlled via transmission fluid pressure through switches. Each pressure switch will control how harsh or smooth a gear changes. Pressure sensors and related shift points vary by manufacturer, by traditionally the E transmission fluid pressure sensor correlates to higher shift points, including the 4-5-6 shifts. The pressure sensors are often integrated into the control solenoid valve assembly or at times on the valve body itself.
A code P0990 will be stored when the ECM or transmission control module has received a voltage reading from the E transmission fluid pressure sensor that is higher than predetermined manufacturer parameters. While each manufacturer varies, the P0990 code will typically not be stored until around 20 failures.
Several problems may cause a P0990 code including:
Symptoms of a P0990 code may include:
A mechanic may use several methods to diagnose a P0990 trouble code, including:
One common mistake with any transmission-related fault code is neglecting to check the transmission fluid level and quality prior to making additional repairs. It is recommended to always start with the transmission fluid, as debris and contamination in the fluid could signal a larger problem, such as internal transmission failure.
Because a vehicle’s safe driving operation most likely will be impacted due to faults that store a P0990 code, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.
Several repairs can fix a P0990 trouble code and include:
Scan tools may see transmission fluid pressure sensor/switch E as being sensor/switch 5. It is recommended to check your vehicle service manual for specifics.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.