Transmission Fluid Pressure Sensor - High
This code indicates that the transmission fluid pressure sensor is reading a value that is higher than expected.
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What it means (plain English)
Inside the transmission, the fluid pressure sensor measures how much hydraulic pressure is in the transmission system. If it's reading above a certain value, it triggers this fault code, letting you know something's off.
What the computer is actually seeing
The PCM sees a transmission fluid pressure reading that exceeds a normal operating range, which could be due to excessive pressure inside the transmission.
What a healthy reading looks like
Normal transmission fluid pressure should range from 20 to 70 PSI, depending on the vehicle and operating conditions. If the reading is above 80 PSI, this code may trigger.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the transmission fluid level; it should be within the operating range. If low, top it off and recheck for codes.
- 22. Inspect wiring and connectors to the transmission fluid pressure sensor for damage, corrosion, or poor connections.
- 33. With the ignition on, use a scan tool to monitor the transmission fluid pressure sensor reading. Is it over 80 PSI?
- 44. If the reading is excessively high, disconnect the sensor and see if the value drops to zero. If it does, the sensor is likely faulty.
- 55. If the reading remains high after disconnecting, suspect an internal failure in the transmission or a pump issue.
Common causes
- Faulty transmission fluid pressure sensor
- Wiring issues to the sensor
- Transmission fluid contamination or overfill
- Faulty transmission pump
- Mechanical failure within the transmission
Typical repair cost
$$ - $$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to address this code soon. Driving with high transmission pressures can lead to further transmission damage.
Will this code come back after clearing it?
If the issue is not resolved—like a faulty sensor or wiring problem—yes, the code will likely return.
Why does this code sometimes appear with others?
This code can be related to other transmission issues, like pump problems or additional sensor faults that affect fluid pressure.
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