Powertrain
generic / SAE
P0943
Hydraulic Pressure Unit Cycling Period Too Short
The hydraulic pressure unit cycles on/off too frequently. Indicates internal leakage or pressure regulation drift.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number9 / 43
Possible causes
- Internal hydraulic leak high
- Pressure regulator drifted medium
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–2500 €
- Estimated time: 2–8 h
- Component: hydraulic pressure unit
- Component: pressure regulator
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012