Bobcat H2807 (28-07) Fault Code: Rear Rod Lock Solenoid Open Circuit/Diverter Solenoid Open Circuit
Also shown on the panel as 28-07 · Also called Diverter Open Circuit, Diverter Solenoid Open Circuit, Rear Rod Lock Solenoid Open Circuit, Rear Rod Lock Solenoid Open Circuit\Diverter Solenoid Open Circuit
Rear Rod Lock Solenoid Open Circuit/Diverter Solenoid Open Circuit · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
H2807 (panel display 28-07) means the auxiliary controller has detected an open circuit on wire 4450, which feeds either the rear rod lock solenoid or the diverter solenoid depending on the machine's auxiliary hydraulic configuration. The fix is almost always a wiring, connector, or harness problem, not a hydraulic failure itself.
Medium severity. This code does not shut the machine down, but it disables control over rear rod lock or diverter functions, which can leave attachments unable to switch hydraulic flow correctly. Diagnose before relying on rear auxiliary functions for attachment work.
What does Bobcat error code H2807 mean?
H2807 is set by the auxiliary controller when it sees an open circuit on signal wire 4450. Depending on the machine and configuration, this wire serves one of two different solenoids: the rear rod lock solenoid, or the diverter solenoid. Both solenoids control where hydraulic flow goes in the rear auxiliary circuit.
The rear rod lock solenoid stops hydraulic fluid flow from the rear rod couplers, which is used to lock an attachment's cylinder in place. The diverter solenoid redirects hydraulic flow away from the front auxiliary couplers and sends it to the rear auxiliary couplers instead, which matters on machines running attachments through rear ports.
In both cases, the controller is looking for a complete electrical path through wire 4450 and its ground return, wire 2450. If that path is broken anywhere between the controller and the solenoid, the controller flags an open circuit and sets H2807.
Common causes of H2807
- Signal wire 4450 or ground wire 2450 open somewhere in the circuit.
- Rear auxiliary harness disconnected from the controller or from the solenoid.
- A fault inside the auxiliary controller itself.
- Moisture, corrosion, or pushed-back pins in the auxiliary controller connectors, in the rear rod lock solenoid connector or diverter solenoid connector, in the rear base lock solenoid connector or rear auxiliary relief solenoid connector (depending on configuration), in the rear auxiliary harness, or in the mainframe harness.
- Intermittent faults: if the code is not active at the time of testing, the root cause may not be found right away. Loose connections, corrosion, pushed-back pins, a marginal controller, or harness damage (or some combination of these) are all possible explanations for a code that comes and goes.
How to troubleshoot Bobcat H2807: first checks
- Confirm the key switch is in run/enter, since this is the condition the controller needs to check the circuit at all.
- Visually inspect the rear auxiliary harness connectors and the auxiliary controller connectors for moisture, corrosion, dirt, or pins that have pushed back out of their sockets.
- Check that the rear auxiliary harness is fully seated and connected, not partially unplugged or disconnected.
- Trace and test continuity on signal wire 4450 and ground wire 2450 from the controller to the solenoid, looking for an open anywhere along the run.
- Inspect the specific solenoid connector for your configuration: rear rod lock solenoid and rear base lock solenoid connectors on rod-lock-equipped machines, or diverter solenoid and rear auxiliary relief solenoid connectors on diverter-equipped machines.
- If the code will not reproduce during testing, wiggle-test the harness and connectors while watching for the code to reappear, since an intermittent open often only shows up under vibration or movement.
- If wiring and connectors check out, suspect the auxiliary controller itself as the last-resort cause.
How the code clears
Clearing H2807 only requires cycling power (turning the key off and back on) once the open circuit has been repaired. There is no separate calibration or reset procedure listed for this code beyond the power cycle.
Affected models and serial ranges
H2807 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 H2807 mean?
It means the auxiliary controller detected an open electrical circuit on wire 4450, which controls either the rear rod lock solenoid or the diverter solenoid, depending on your machine's auxiliary hydraulic setup.
What is the panel display number for H2807?
On the display panel, this code shows as 28-07.
Is H2807 the same fault on every Bobcat model?
The underlying open-circuit condition is the same, but the affected solenoid differs by configuration. Some machines use this circuit for the rear rod lock solenoid, others use it for the diverter solenoid that sends flow to the rear auxiliary couplers.
Can I keep working with H2807 active?
You can generally keep operating, but the affected function (rear rod lock or diverter control) will not work correctly. If your attachment depends on that function, expect it to behave unexpectedly and inspect the issue before relying on it.
How do I clear H2807 after fixing it?
Cycle the key power off and back on. No other reset steps are listed for this code.
Why does H2807 come back after I clear it?
An intermittent open circuit, often caused by corrosion, a loose connector, or a pushed-back pin, can clear temporarily and then reset once vibration or moisture disturbs the connection again. Wiggle-testing the harness while watching for the code is the best way to catch this.
Which connectors should I check first for H2807?
Start with the auxiliary controller connectors and the rear auxiliary harness connector, then move to the specific solenoid connector for your setup, either the rear rod lock/rear base lock solenoids or the diverter/rear auxiliary relief solenoids.