Bobcat M1017 (10-17) Fault Code: Hydraulic Charge Filter Plugged
Also shown on the panel as 10-17
Hydraulic Charge Filter Plugged · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
M1017, shown on the panel as 10-17, means the gateway controller saw the hydraulic charge filter switch open for 30 seconds while the engine was running and hydraulic charge oil was above 130°F. This almost always points to a plugged hydraulic charge filter or a wiring/ground problem at the filter switch.
Medium severity. This code does not by itself indicate immediate engine or safety damage, but a plugged hydraulic charge filter reduces charge flow to the hydraulic system over time. Diagnose it during the same shift rather than continuing to run the machine hard.
What does Bobcat error code M1017 mean?
M1017 is set by the gateway controller when the hydraulic charge filter switch, a normally closed switch mounted on the back of the hydraulic charge fan filter assembly, is detected open for 30 seconds while the engine is running and hydraulic charge oil temperature is above 130°F.
The switch is grounded through the filter housing itself. As the filter loads up with debris, the pressure difference across it increases. Once that pressure difference reaches a critical level, the switch opens, telling the controller the filter is plugged.
This system supplies charge oil pressure that keeps the hydraulic drive and other circuits properly supplied. A genuinely plugged filter restricts flow and can starve downstream components if ignored long enough, so the code is worth taking seriously even though it is not an immediate shutdown event.
What triggers a Bobcat M1017 code?
The code sets when the key switch (or run/enter) is on, the engine is running, hydraulic charge oil temperature is above 130°F, and the hydraulic charge filter switch is open for 30 seconds.
Common causes of M1017
- Plugged hydraulic charge filter
- The hydraulic charge filter switch is not grounded through the filter housing during operation
- Signal wire 3440 is open
- Faulty hydraulic charge filter switch
- Faulty gateway controller
- Moisture, corrosion, or pushed back pins in the gateway controller connectors, hydraulic charge filter switch connector, or the mainframe harness
- Intermittent causes that may not be found at the time of testing, including loose connections, corrosion, pushed back pins, the controller, the wire harness, or a combination of these problems
How to troubleshoot Bobcat M1017: first checks
- Inspect and, if needed, replace the hydraulic charge filter first since a plugged filter is the most common and simplest cause
- Check that the hydraulic charge filter switch has a good ground connection through the filter housing, looking for paint, corrosion, or debris breaking that ground path
- Inspect signal wire 3440 for an open circuit or damage between the switch and the gateway controller
- Check the hydraulic charge filter switch connector, gateway controller connectors, and mainframe harness connectors for moisture, corrosion, or pushed back pins
- Test the hydraulic charge filter switch itself for proper normally closed operation
- If the code is intermittent and not present during testing, recheck all connections, wiring, and the controller since the cause may not be immediately apparent
How the code clears
Once the repair is complete, cycle power to clear the code. No other reset procedure is listed for this code.
Affected models and serial ranges
M1017 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 M1017 mean?
It means the gateway controller detected the hydraulic charge filter switch open for 30 seconds while the engine was running and hydraulic charge oil was above 130°F, indicating the hydraulic charge filter is likely plugged.
What is the panel display number for M1017?
It shows on the panel as 10-17.
Is M1017 safe to keep operating with?
It is not an immediate emergency, but a plugged hydraulic charge filter restricts hydraulic charge flow. It is best to stop and diagnose within the same shift rather than continue extended operation.
What is the most common cause of M1017?
A plugged hydraulic charge filter is listed first and is the most straightforward cause to check and correct.
Can a wiring or grounding issue cause M1017 even if the filter is fine?
Yes. The switch grounds through the filter housing, so a poor ground, an open signal wire (wire 3440), corrosion or pushed back pins in connectors, or a faulty switch or controller can all trigger the code without an actual plugged filter.
How do I clear M1017 after repair?
Cycle power to the machine. No separate clearing step is listed beyond that.
Why does M1017 only set above 130°F oil temperature?
The set conditions require hydraulic charge oil temperature above 130°F along with the engine running and the switch open for 30 seconds, which are the specific conditions the gateway controller checks before flagging the code.