What Does P0933 Mean?
The PCM or TCM has determined that the hydraulic pressure sensor signal is out of the expected range or the sensor's output does not correlate correctly with actual operating conditions. While the circuit itself may be intact, the readings are inconsistent with what the control module expects based on solenoid commands and operating state. This can indicate a mechanical issue with the sensor, a clogged pressure port, or an actual hydraulic system problem.
Common Causes
30%
Hydraulic pressure sensor drift or calibration error due to age or contamination
20%
Clogged or restricted pressure port at the sensor mounting location
25%
Actual hydraulic pressure out of range due to pump wear, regulator malfunction, or internal leaks
15%
Intermittent wiring fault causing erratic sensor readings
10%
Incompatible or incorrect replacement sensor installed
Diagnostic Steps
1
Compare the scan tool hydraulic pressure reading to an independent gauge reading at the pressure test port; this determines if the sensor is inaccurate or the system pressure is genuinely out of range.
2
Inspect the sensor mounting location for a clogged or restricted pressure port that could prevent the sensor from reading true system pressure.
3
With the engine running, monitor the pressure sensor reading at idle, under stall, and during shifts; compare to manufacturer specifications for each condition.
4
If the sensor reading matches the gauge but both are out of range, diagnose the hydraulic system itself (pump, regulator, internal leaks).
5
If the gauge reads normal but the sensor does not, replace the hydraulic pressure sensor with the correct OEM-specified part.
Estimated Repair Cost
$150 - $700
Parts + labor, varies by vehicle and location
The PCM or TCM has determined that the hydraulic pressure sensor signal is out of the expected range or the sensor's output does not correlate correctly with actual operating conditions. While the circuit itself may be intact, the readings are inconsistent with what the control module expects based ...
The most common cause of P0933 (Hydraulic Pressure Sensor Range/Performance) is: Hydraulic pressure sensor drift or calibration error due to age or contamination
Typical repair costs for P0933 range from $150 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Inaccurate hydraulic pressure feedback can cause the control module to command incorrect pressure levels, resulting in harsh or soft shifts, clutch slipping, or band damage. If actual system pressure is out of range, the underlying hydraulic fault needs urgent attention.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0933 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission
Difficulty
Type
Generic (SAE)
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