Bobcat H2907 (29-07) Fault Code: High Flow Solenoid Open Circuit
Also shown on the panel as 29-07 · Also called High-Flow Open Circuit
High Flow Solenoid Open Circuit · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
H2907 (panel display 29-07) sets when the auxiliary controller detects an open circuit on the high flow solenoid, its signal wire 4460, or its return wire 2460. This disables the added flow from the high flow pump to the front base auxiliaries. It's a wiring/solenoid electrical fault, not a hydraulic pressure fault, though it affects hydraulic output.
Medium severity. H2907 does not stop the machine from running or driving, but it disables high flow output to front auxiliaries, which affects attachments that need that extra flow to function properly. Diagnose before running flow-dependent attachments.
What does Bobcat error code H2907 mean?
H2907 means the auxiliary controller has detected an open circuit somewhere in the high flow solenoid circuit, specifically the solenoid itself, signal wire 4460, or return wire 2460.
The high flow solenoid's job is to let output from the high flow pump join the normal auxiliary flow. This added flow only kicks in when the front base auxiliaries are engaged, so attachments needing extra flow (like cold planers, mulchers, or high-flow augers) won't get full performance if this circuit is open.
This is an open-circuit detection, meaning the controller sees no continuity where it expects to, rather than a pressure or flow reading problem downstream in the hydraulic circuit.
Common causes of H2907
- Signal wire 4460 or return wire 2460 open somewhere in the harness.
- Failed high flow solenoid.
- Faulty auxiliary controller.
- Moisture, corrosion, or pushed-back pins in the auxiliary controller connectors, the high flow solenoid connector, or the mainframe harness.
- Intermittent causes that may not show up if the code isn't active during testing: loose connections, corrosion, pushed-back pins, a failing controller, or harness damage, alone or in combination.
How to troubleshoot Bobcat H2907: first checks
- With the key switch or run/enter switch on, check that the code is currently active before you start tearing into wiring, since intermittent faults may not reproduce on demand.
- Inspect the high flow solenoid connector and the auxiliary controller connectors for moisture, corrosion, or pins that have been pushed back out of their sockets.
- Trace signal wire 4460 and return wire 2460 through the mainframe harness looking for chafe points, cut insulation, or connector damage that could cause an open.
- Check the high flow solenoid itself for continuity and proper operation if the wiring checks out clean.
- If nothing shows up and the code is intermittent, treat all of the above as suspects together: connections, corrosion, pushed-back pins, the controller, and the harness, since any combination can produce an intermittent open.
How the code clears
Once the repair is complete, cycle key power (turn the key switch off, then back on) to clear the code. No separate clearing procedure is listed beyond cycling power.
Affected models and serial ranges
H2907 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 A3NT10001-12369, 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 H2907 mean?
It means the auxiliary controller detected an open circuit on the high flow solenoid, the signal wire (4460), or the return wire (2460), which stops the high flow pump's output from joining the normal auxiliary flow to front base auxiliaries.
Is H2907 the same as panel code 29-07?
Yes, 29-07 is the numeric panel display form of H2907 on Bobcat machines that use the numeric fault display.
Can I still run my attachment with H2907 active?
Base auxiliary hydraulic flow may still work, but the added output from the high flow pump won't be joining it, so attachments that rely on high flow for full performance won't get it until the fault is fixed.
What wires should I check first for H2907?
Check signal wire 4460 and return wire 2460 for opens, along with the high flow solenoid connector and the auxiliary controller connectors for corrosion or pushed-back pins.
Why does H2907 come and go instead of staying on?
Intermittent H2907 codes are usually caused by loose connections, corrosion, or pushed-back pins that only cause an open under certain vibration or moisture conditions. If the code isn't active during testing, the cause may not be found right away.
How do I clear H2907 after a repair?
Cycle the key power off and back on. No other clearing steps are listed for this code.
Which Bobcat models can show H2907?
It applies to S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, T770, and T870 models equipped with high flow auxiliary hydraulics.