Transmission Fluid Pressure Sensor - Circuit Voltage High
The transmission fluid pressure sensor is reporting a high voltage signal.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer sees too much voltage coming from the transmission fluid pressure sensor, which typically means there's a short somewhere or the sensor is malfunctioning.
What the computer is actually seeing
The transmission control module expects a voltage signal around 0.5 to 4.5 volts from the sensor, but it's receiving a signal above 4.5 volts, indicating an error.
What a healthy reading looks like
Typical sensor signal voltage ranges from 0.5V (low pressure) to 4.5V (high pressure).
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. Inspect the wiring and connector for damage or corrosion (look for bare wires, frayed ends).
- 22. Measure the voltage at the transmission fluid pressure sensor with the ignition on but engine off; it should be around 0.5V to 4.5V. If it's above 4.5V, there's a problem.
- 33. Disconnect the sensor and measure the voltage at the harness connector. If the voltage remains high, the issue is in the wiring or module; if it drops to normal, the sensor is bad.
- 44. If wiring and connections are good, replace the transmission fluid pressure sensor and recheck the system.
Common causes
- Shorted wiring to the sensor
- Faulty transmission fluid pressure sensor
- Corroded connector terminals
- Software issue in the transmission control module
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive as it can cause shifting issues, which may lead to further transmission damage.
Will this code clear on its own?
No, the code won't clear until the issue is resolved and the system is reset.
Why does this code often pair with SPN 1852?
SPN 1852 indicates a different sensor issue in the same circuit, often pointing to a common wiring fault.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →