Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer found a problem with the sensor that checks the pressure of the transmission fluid. It's like the sensor is saying the pressure is too high, even if it might not be.
The transmission fluid pressure sensor/switch E is reporting a higher than expected voltage, indicating a possible issue with the sensor or its circuit.
The P0990 code is set when the Powertrain Control Module (PCM) detects a high voltage condition in the transmission fluid pressure sensor/switch E circuit. This could be due to a faulty sensor, wiring issues, or a problem with the PCM itself.
• Check Engine Light illuminated
• Transmission may not shift properly
• Poor fuel economy
• Faulty transmission fluid pressure sensor/switch
• Wiring issues such as short circuits or open circuits
• Faulty PCM
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the transmission fluid pressure sensor/switch for proper operation.
• Replace the faulty transmission fluid pressure sensor/switch.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check transmission fluid levels.
• Inspect wiring and connectors for wear.
• Perform routine maintenance on the transmission system.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving long distances until the issue is resolved.
Check with your vehicle's manufacturer for specific warranty coverage on transmission components.
This code has been commonly reported in vehicles with higher mileage where sensor wear is more likely.
Moderate – It is important to address this issue to prevent potential transmission damage.
Driving with a malfunctioning transmission can be dangerous and may lead to further damage.
• Vehicle must be in drive mode.
• Transmission fluid temperature should be within normal operating range.
The transmission fluid pressure sensor/switch is typically located on or inside the transmission housing.
Q: Can I drive with a P0990 code?
A: It's not recommended to drive for long periods with this code, as it may cause further transmission damage.
Q: How do I clear a P0990 code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is resolved first.
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