Bobcat M1732 (17-32) Fault Code: Hydraulic Lock Valve Solenoid Over Current
Also shown on the panel as 17-32 · Also called Hydraulic Lock Valve Overcurrent
Hydraulic Lock Valve Solenoid Over Current · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
Bobcat code M1732 (panel display 17-32) sets when the gateway controller sees too much current on the hydraulic lock valve solenoid return wire 2410, more than the controller's output driver can safely handle. When M1732 is active, lift and tilt functions are disabled until the fault is fixed and power is cycled.
High severity. M1732 disables both lift and tilt functions, which stops normal loader operation. It is not an immediate engine or fire hazard, but the machine cannot do productive work until the short or faulty component is found, so it should be diagnosed before returning the machine to service.
What does Bobcat error code M1732 mean?
M1732 is set by the gateway controller when it detects excessive current flowing through the hydraulic lock valve solenoid's return wire, identified as wire 2410. The controller's output driver has a current limit it can handle without being damaged, and when that limit is exceeded, the controller shuts down lift and tilt to protect itself and the machine.
This is an electrical protection fault tied to a hydraulic component. The hydraulic lock valve normally locks out lift/tilt movement when the machine is not in an operating mode, so a solenoid or wiring problem here directly affects whether the loader arms will move at all.
Because the fault disables lift and tilt outright, operators will notice it immediately as loss of loader function, not just a warning light.
Common causes of M1732
- Return wire 2410 shorted to supply voltage, or shorted to signal wire 4410
- Faulty hydraulic lock valve solenoid
- Faulty gateway controller
- Moisture, corrosion, or pushed back pins in the gateway controller connectors, hydraulic lock valve solenoid connector, or the mainframe harness
- Intermittent fault caused by a combination of loose connections, corrosion, pushed back pins, the controller, or the wire harness that may not be found if the code is not active during testing
How to troubleshoot Bobcat M1732: first checks
- With key switch in the run/enter position, confirm the code is active before starting teardown
- Inspect the hydraulic lock valve solenoid connector and the mainframe harness connectors for moisture, corrosion, or pushed back pins
- Check return wire 2410 for a short to supply voltage or a short to signal wire 4410
- Inspect the gateway controller connectors for corrosion or damaged pins
- Test the hydraulic lock valve solenoid itself for an internal short or failure
- If the code is not currently active, treat it as intermittent and inspect all connections and the harness carefully since the exact cause may not show up on a single test
How the code clears
Once the repair is complete, cycle the key switch power to clear code M1732. No separate clearing step is listed beyond cycling power.
Affected models and serial ranges
M1732 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 M1732 mean?
It means the gateway controller detected too much current on the hydraulic lock valve solenoid's return wire 2410, more than its output driver can safely handle, and it has disabled lift and tilt to protect itself.
Can I still drive the machine with M1732 active?
Driving is not directly addressed for this code, but lift and tilt functions are disabled, so loader work is not possible until the fault is corrected.
What usually causes M1732 on Bobcat loaders?
Common causes include return wire 2410 shorted to supply voltage or to signal wire 4410, a failed hydraulic lock valve solenoid, a faulty gateway controller, or corrosion and pushed back pins in the connectors and mainframe harness.
How do I clear code M1732 after fixing it?
Cycle the key switch power off and back on. No other clearing procedure is listed.
Why does M1732 disable lift and tilt?
The controller disables these functions as a protective measure once it detects the solenoid circuit is drawing more current than its driver can handle without damage.
What if the code doesn't show up when I test it?
If M1732 is intermittent and not active during testing, the exact cause may not be found right away. Check all connections, corrosion points, pushed back pins, the harness, and the controller carefully, since any combination of these can cause an intermittent fault.
Which Bobcat models can show code M1732?
M1732 applies to the S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, T770, and T870 models.