Powertrain
generic / SAE
P0946
Hydraulic Pump Relay/Control Circuit Range/Performance
The hydraulic pump relay/control circuit reports a circuit range/performance condition. Pump cannot be commanded reliably.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number9 / 46
Possible causes
- Relay contacts aged high
- High-resistance contact medium
- Sensor element aged beyond calibration window low
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: medium
- DIY: shop recommended
- Estimated cost: 150–800 €
- Estimated time: 0.5–3 h
- Component: hydraulic pump relay
- Component: wiring harness
- Component: tcm
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012