Bobcat M0711 (07-11) Fault Code: Hydraulic Oil Temperature Extremely High
Also shown on the panel as 07-11 · Also called Hydraulic Fluid Temperature Extremely High
Hydraulic Oil Temperature Extremely High · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
M0711 (panel code 07-11) sets when the Bobcat gateway controller sees a signal voltage above 3.51 volts on the hydraulic oil temperature sensor wire (3220 or 3300, depending on model) for 5 seconds with the key on and engine running. This corresponds to a hydraulic oil temperature above 235°F, which is genuinely hot and can damage seals, hoses, and pump components if ignored.
High severity. An oil temperature above 235°F is high enough to accelerate seal and hose failure and to degrade the hydraulic fluid itself. It is not an immediate shutdown emergency like a critical engine overheat, but it should not be worked through. Stop, let the machine cool, and diagnose before returning to heavy hydraulic use.
What does Bobcat error code M0711 mean?
M0711 is Bobcat's fault code for hydraulic oil temperature that has climbed extremely high, well past normal operating range. The gateway controller monitors a signal wire from the hydraulic oil temperature sensor. As oil temperature rises, the sensor's resistance rises, which pushes the signal voltage up on wire 3220 or 3300 depending on the model.
When that voltage exceeds 3.51 volts for a sustained 5 seconds, the controller logs M0711. This voltage level lines up with an oil temperature above 235°F. The sensor itself has a working resistance range of 500 to 3000 ohms, and with the sensor disconnected the controller should read 7.85 volts (±0.05) on the signal wire, a useful reference point when bench testing the circuit.
This code sets with the key switch in run/enter and the engine running, meaning the system is actively working when the overheat condition is detected. It is not a code that appears with the machine sitting off.
What triggers a Bobcat M0711 code?
The gateway controller sets M0711 when it detects a signal voltage greater than 3.51 volts on wire 3220 (or wire 3300 on some models) for 5 seconds, which corresponds to a hydraulic oil temperature above 235°F. The code requires the key switch in run/enter and the engine running.
Common causes of M0711
- Low hydraulic oil level, which reduces the fluid's ability to absorb and dissipate heat.
- External obstruction of airflow at the radiator and hydraulic oil cooler, restricting cooling.
- High ambient temperature combined with extreme working conditions that push the hydraulic system beyond its cooling capacity.
- A failing hydraulic oil temperature sensor giving a false high reading.
- A fault in the gateway controller itself.
- Moisture, corrosion, or pushed-back pins in the gateway controller connectors, the hydraulic oil temperature sensor connector, or the mainframe wire harness.
- Intermittent wiring or connector problems that may not be present at the time of testing, including loose connections, corrosion, pushed-back pins, the controller, or the wire harness, alone or in combination.
How to troubleshoot Bobcat M0711: first checks
- Check the hydraulic oil level and top off if low before doing anything else.
- Inspect the radiator and hydraulic oil cooler fins for debris, mud, or other obstructions blocking airflow, and clean as needed.
- Let the machine cool down fully before opening or servicing any hydraulic components.
- Inspect the hydraulic oil temperature sensor connector and the gateway controller connectors for moisture, corrosion, or pushed-back pins.
- With the sensor disconnected, check for 7.85 volts (±0.05) on the signal wire (3220 or 3300 depending on model) to confirm the supply circuit is healthy.
- Check the sensor's resistance against its rated 500 to 3000 ohm operating range to see if it is reading in range or stuck.
- Inspect the mainframe wire harness for chafing, pinches, or corrosion between the sensor and the gateway controller.
- Consider recent working conditions: heavy load in high ambient heat can cause a legitimate high-temp event rather than a sensor or wiring fault.
How the code clears
M0711 is self resetting. No separate clearing step is listed. Once the hydraulic oil temperature drops back into normal range and the underlying cause is fixed, the code clears on its own without a manual reset procedure.
Affected models and serial ranges
M0711 appears in our records across 16 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| S510 | SN A3NJ11001-99999, SN A3NK11001-99999, SN ATZC11001-ATZC99999 |
| S530 | SN A7TV11001-99999, SN ATZD11001-99999 |
| S550 | SN A3NK11001-A3NL99999, SN A3NM11001-99999 |
| S570 | SN A7U711001-799999, SN A7U811001-899999 |
| S590 | SN ANMN11001-99999, SN ANMP11001-99999 |
| S630 | SN A3NT12370-99999, SN A3NU11001-11111, SN A3NU11112-99999 |
| S650 | SN A3NV11001-13098, SN A3NV13099-99999, SN A3NW11001-11248, SN A3NW11249-99999 |
| S750 | SN A3P211001-299999 |
| S770 | SN A3P411001-99999 |
| T550 | SN A7UJ11001-AJZV12276 |
| T590 | SN ALJU11001-999999, SN B37811001-999999, SN B3Z711001-999999 |
| T630 | SN A7PU11001-11663, SN A7PU11664-99999 |
| T650 | SN A3P012214-099999, SN A3P111242-199999 |
| T750 | SN ANKA11001-A99999 |
| T770 | SN A3P811001-899999, SN A3P911001-999999 |
| T870 | SN A3PG11001-99999, SN A3PH11001-99999 |
Frequently asked questions
What does Bobcat code M0711 mean?
It means the gateway controller has detected that hydraulic oil temperature is extremely high, above 235°F, based on a signal voltage above 3.51 volts held for 5 seconds on the sensor wire.
Is M0711 safe to ignore?
No. Sustained hydraulic oil temperatures above 235°F can damage seals, hoses, and pump components over time. Stop and let the machine cool, then find the cause.
Why does M0711 keep coming back?
Repeat occurrences usually point to a real cooling problem, low oil level, blocked radiator or hydraulic cooler airflow, or high ambient heat combined with heavy work. If it is intermittent, check connectors and wiring for corrosion or pushed-back pins.
Do I need to manually clear M0711?
No. The code is self resetting once the hydraulic oil temperature returns to normal and the fault condition is resolved. No distinct clearing procedure is listed.
Which wire does the hydraulic oil temperature sensor use on my Bobcat?
It depends on the model. Some use wire 3220 and others use wire 3300, but the fault logic and thresholds are the same either way.
How do I test the hydraulic oil temperature sensor itself?
With the sensor disconnected, the signal wire should read 7.85 volts (±0.05). The sensor's resistance should fall within its 500 to 3000 ohm operating range, decreasing as temperature drops and increasing as it rises.
Can a dirty radiator or hydraulic cooler cause M0711?
Yes. External obstruction of airflow at the radiator and hydraulic oil cooler is listed as a possible cause, since it limits the system's ability to shed heat under load.