P0990

2017-10-10

Description:

  • The fault code P0990 indicates a high voltage condition in the circuit of transmission fluid pressure sensor/switch 'E'. This sensor/switch is responsible for monitoring the fluid pressure within the transmission. A high voltage in the circuit can indicate a problem with the sensor/switch or a fault in the wiring.

Possible Symptoms:

  • Malfunction Indicator Lamp (MIL) or Check Engine Light illuminated.

  • Abnormal transmission shifting behavior.

  • Harsh or delayed shifting between gears.

  • Erratic or unpredictable gear changes.

  • Reduced performance or power from the transmission.

  • Other associated transmission

  • related fault codes may be present.

  • No noticeable drivability issues are typically associated with this fault code.

Possible Causes:

  • Faulty transmission fluid pressure sensor/switch 'E'

  • Wiring or electrical connection issues in the circuit

  • Short circuit to power in the circuit

  • Malfunctioning transmission control module (TCM)

  • Problems with the transmission fluid pump

Related Parts:

  • Hydraulic Pressure Sensor: Hydraulic oil is needed for the gear lubrication system. This sensor measures oil pressure. This car's sensor has a problem which may cause difficulty in shifting gears

Possible Solutions:

  • Inspect the wiring and electrical connections in the circuit for any damage, loose connections, or corrosion. Repair or replace as necessary.

  • Test and replace the faulty transmission fluid pressure sensor/switch 'E', if necessary.

  • Check for any short circuits to power in the circuit and repair as needed.

  • Verify the functionality of the transmission control module (TCM). Replace if it is defective.

  • Inspect the transmission fluid pump for any issues or malfunctions. Repair or replace as necessary.

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