P0943
PowertrainTransmission Pressurehigh severityHydraulic Pressure Unit Cycling Period Too Short
What P0943 Means
The transmission hydraulic pressure accumulator is cycling on and off too frequently. This often points to a leak in the hydraulic system or a failing pump that can't hold pressure.
Symptoms
- Harsh or erratic shifting
- Transmission warning light on
- Whining noise from transmission
Common Causes
- Internal transmission fluid leak
- Faulty hydraulic pump
- Worn accumulator or seals
- Low transmission fluid level
Diagnostic Steps
- Check transmission fluid level and condition
- Scan for related transmission codes
- Test hydraulic system pressure
- Inspect pump and accumulator for wear or leaks
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