Powertrain
generic / SAE
P0940
Hydraulic Oil Temperature Sensor Circuit High
The hydraulic oil temperature sensor reports a circuit high fault. Oil temperature feedback for hydraulic system is unreliable.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number9 / 40
Possible causes
- Signal wire shorted to B+ high
- Open sensor medium
- Connector pins corroded - high contact resistance 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: easy
- DIY: possible
- Estimated cost: 60–300 €
- Estimated time: 0.3–1.5 h
- Component: hydraulic oil temp sensor
- Component: wiring harness
- Component: tcm
- MIL / check engine light
Sources
References
sae:J2012