Transmission Fluid Pressure Sensor Circuit Intermittent
The transmission control module is detecting an intermittent signal from the fluid pressure sensor.
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What it means (plain English)
The sensor that measures the fluid pressure in the transmission isn't sending a steady signal to the computer, which might mean the transmission isn't getting enough pressure to work properly.
What the computer is actually seeing
The Transmission Control Module (TCM) expects a consistent voltage signal from the fluid pressure sensor, usually between 0.5V and 4.5V, depending on the pressure applied. An intermittent signal means the voltage fluctuates outside this expected range.
What a healthy reading looks like
Fluid pressure sensor normally outputs a voltage related to pressure; expect between 1V (low pressure) to 4V (high pressure) at idle.
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 wiring and connectors at the transmission fluid pressure sensor for damage or corrosion. Repair as needed and retest.
- 22. Inspect transmission fluid level and condition; it should be between the marked levels on the dipstick and clean.
- 33. Measure the voltage output from the transmission fluid pressure sensor with a multimeter while the engine is running. It should vary smoothly between 1V and 4V as you throttle the engine. If it isn't, replace the sensor.
- 44. If the sensor checks out, scan for other related fault codes that may indicate further issues with the TCM or transmission.
- 55. Clear the codes, and take the vehicle for a test drive to see if the code returns.
Common causes
- Wiring or connector issues between the sensor and TCM.
- Faulty transmission fluid pressure sensor.
- Dirty or low transmission fluid level.
- Internal transmission failure affecting pressure. Adjustments or replacements may be needed.
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It may be drivable, but the transmission could experience shifting issues or failure under load. Fix it sooner rather than later.
Why does this code sometimes not show up when I check for codes?
Intermittent issues can come and go, so if it's a wiring fault, it may only trigger occasionally.
Can this code cause damage to the transmission?
Yes, if the pressure drops too low and isn't addressed, it could lead to significant transmission damage.
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