P0942
PowertrainTransmission Pressurehigh severityHydraulic Pressure Unit
What P0942 Means
A general fault has been detected in the transmission hydraulic pressure unit. This can affect line pressure and overall shift control.
Symptoms
- Harsh or slipping shifts
- Transmission warning light on
- Loss of gear engagement
Common Causes
- Faulty hydraulic pressure unit
- Low transmission fluid
- Internal transmission damage
- Control module or wiring fault
Diagnostic Steps
- Retrieve stored codes
- Check transmission fluid level and pressure
- Inspect hydraulic unit and wiring
- Perform line pressure test
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
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SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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