Bobcat H2405 (24-05) Fault Code: Rear Rod Solenoid Short to Battery
Also shown on the panel as 24-05 · Also called Rear Rod Output Short to Battery, Rear Rod Solenoid Short To Battery, Rear Rod Solenoid Short to Battery
Rear Rod Solenoid Short to Battery · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
H2405 (panel code 24-05) sets when the auxiliary controller sees battery voltage on the rear rod solenoid's signal wire, wire 4430, when the solenoid has not been commanded on. The controller disables the rear rod function, which stops hydraulic flow through the rear auxiliary male coupler, until the fault is fixed and power is cycled.
Medium severity. H2405 disables the rear rod auxiliary hydraulic function, which affects operation of attachments using the rear coupler, but it does not by itself indicate an engine, brake, or lifting-safety failure. Treat it as a function-down issue to diagnose before relying on that attachment circuit again.
What does Bobcat error code H2405 mean?
Code H2405 is set by the auxiliary controller when it detects battery voltage present on wire 4430, the signal wire for the rear rod solenoid, at a time when the controller has not commanded that solenoid on. The rear rod solenoid directs hydraulic flow through the rear auxiliary male coupler, so this circuit controls attachment functions run off that coupler.
When the controller sees this unexpected voltage, it treats the signal wire as shorted to battery power and disables the rear rod function as a protective measure. This means the attachment or function normally driven by the rear rod solenoid will not operate until the fault is cleared.
This code sets whenever the key switch is in the run/enter position, so it can appear during normal operation any time the unwanted voltage is present on the signal circuit.
Common causes of H2405
- Signal wire 4430 shorted to battery voltage.
- Return wire 2430 shorted to supply voltage, or shorted to signal wire 4430.
- A failed rear rod solenoid.
- A failed auxiliary controller.
- Moisture, corrosion, or pushed-back pins in the auxiliary controller connectors, the rear rod solenoid connector, or the mainframe harness.
- Intermittent conditions from loose connections, corrosion, pushed-back pins, the controller, the wire harness, or a combination of these, which may not be found if the code is not active at the time of testing.
How to troubleshoot Bobcat H2405: first checks
- With the key switch off, inspect the rear rod solenoid connector and the auxiliary controller connectors for moisture, corrosion, or pins that have been pushed back out of position.
- Check wire 4430 (signal) for a short to battery voltage along its full length between the auxiliary controller and the rear rod solenoid.
- Check wire 2430 (return) for a short to supply voltage or for contact with signal wire 4430, especially at connector splices or chafe points in the mainframe harness.
- Test the rear rod solenoid itself for an internal short or fault that could feed battery voltage back onto the signal wire.
- If the code is not active during testing, treat it as intermittent and inspect connections, corrosion points, and pinned connectors carefully since the fault may not reproduce on demand.
- Verify the auxiliary controller is functioning correctly if wiring and solenoid checks come back clean.
How the code clears
Once the wiring, solenoid, or controller issue is repaired, clear code H2405 by cycling the key switch power off and back on. No separate clearing step is listed beyond this power cycle.
Affected models and serial ranges
H2405 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 ATZC11001-99999 |
| 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 A39511001-99999, 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 H2405 mean?
It means the auxiliary controller detected battery voltage on wire 4430, the rear rod solenoid's signal wire, when that solenoid was not commanded on. The controller responds by disabling the rear rod function.
Will my attachment still work with code H2405 active?
The rear rod function, which sends hydraulic flow through the rear auxiliary male coupler, is disabled when this code is active, so attachments relying on that flow direction will not operate correctly until the fault is fixed.
What usually causes H2405?
Common causes include signal wire 4430 shorted to battery voltage, return wire 2430 shorted to supply voltage or to wire 4430, a failed rear rod solenoid, a failed auxiliary controller, or corrosion and pushed-back pins in the related connectors.
How do I clear code H2405 after repair?
Cycle the key switch power off and back on. That is the only clearing step listed for this code.
Why does H2405 come and go instead of staying on?
If the short is intermittent, such as a loose connection, corrosion, or a pin that is pushed back but still occasionally making contact, the code may not be active every time you check. In that case a careful visual and physical inspection of connectors and harness routing is needed since the fault may not show up on demand.
Which Bobcat machines can show code H2405?
This code applies across a range of skid-steer and compact track loader models, including the S510, S530, S550, S570, S590, S630, S650, S750, S770, and the T550, T590, T630, T650, T750, T770, and T870.
Is H2405 the same as the panel display code 24-05?
Yes, 24-05 is the numeric panel form of the same fault, H2405, for the rear rod solenoid short to battery condition.