P0992: Transmission Fluid Pressure Sensor/Switch F Circuit
What to do
Symptoms will be confined to particular gears. Ask whether all the pressure readings were compared together; with this many sensors the vehicle can usually name the affected circuit itself.
What this code means
A fault in a sixth pressure monitoring circuit — the last of the family, and the point at which essentially every clutch in the transmission has its own pressure measurement.
Worth stating plainly at the end of this run: the reason the standard needed six of these is that transmissions acquired more ratios, and more ratios meant more independently controlled clutches. Each one added a circuit to watch. So the sheer number of pressure codes in the corpus is not duplication — it is the record of gearboxes becoming more capable and, in exchange, more instrumented.
Likely causes
Start here
- Faulty transmission fluid pressure sensor · moderate
- Low or degraded transmission fluid · easy
- Worn valve body · specialist
Less common
- Damaged transmission wiring harness · moderate
- Faulty pressure control solenoid · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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- The car — make, model, year and engine. The same fault behaves differently on each.
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