Bobcat A8207 (82-07) Fault Code: ACD/RACD Output “C” Open Circuit
Also shown on the panel as 82-07 · Also called ACD Output ‘C’ Open Circuit
ACD/RACD Output “C” Open Circuit · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
A8207 (panel form 82-07) sets when the ACD/RACD controller cannot detect the solenoid wired to output "C" (controller pin J1 B-13) or its return wire (controller pin J1 A-1). When this code is active, output "C" is disabled by the controller.
Medium severity. Output "C" is disabled while the code is active, so whatever attachment function depends on that output will not work. This is not an engine-damage or immediate safety-shutdown code, but it should be diagnosed before relying on that attachment function since it may fail exactly when needed.
What does Bobcat error code A8207 mean?
A8207 is set by the ACD/RACD controller, which manages attachment control device functions on many Bobcat skid steer, compact track, and compact excavator models. This controller sends and monitors current through specific solenoid outputs to operate attachment features. Output "C" is one of these controlled circuits.
When the controller cannot detect a solenoid connected to output "C" at controller pin J1 B-13, or does not see the return path through controller pin J1 A-1, it assumes the circuit is open and sets A8207. As a protective measure, the controller disables output "C" until the fault is resolved and the code cleared.
In plain terms, this is a wiring or solenoid detection fault on one specific attachment output circuit. It does not necessarily mean the machine has a major electrical failure, but the specific function tied to output "C" will not operate until the open circuit is found and fixed.
Common causes of A8207
- Output "C" wire at controller pin J1 B-13, or the return wire at controller pin J1 A-1, is open (broken, disconnected, or cut).
- Fault in the output "C" solenoid itself.
- Fault in the ACD/RACD controller.
- Moisture, corrosion, or pushed-back pins in the ACD/RACD controller connectors, mainframe harness, attachment control harness, or the output "C" solenoid connector.
- Intermittent fault not active at time of testing: possible causes include loose connections, corrosion, pushed-back pins, the controller, the wire harness, or a combination of these problems.
How to troubleshoot Bobcat A8207: first checks
- With key switch / run-enter on, check for the active code, then inspect the output "C" solenoid connector and its mating harness connector for moisture, corrosion, or pins that have been pushed back out of position.
- Trace the wiring from the output "C" solenoid back to controller pin J1 B-13, and the return wire back to controller pin J1 A-1, checking for an open circuit, cut wire, or loose connection anywhere along the harness.
- Inspect the ACD/RACD controller connector itself for corrosion, moisture intrusion, or pushed-back pins, since the fault can originate at the controller end rather than the solenoid end.
- Check the attachment control harness and mainframe harness connectors in between, since either can be the source of an open circuit if the fault is not isolated to the solenoid or controller ends.
- If the code is not currently active (intermittent), wiggle-test connectors and harness sections while watching for the code to reset, since intermittent opens caused by loose connections or corrosion may not show up during a static check.
How the code clears
Once the open circuit or faulty component is repaired, cycle power (turn the key switch off and back on) to clear code A8207. No separate clearing step is listed beyond cycling power.
Affected models and serial ranges
A8207 appears in our records across 20 Bobcat models. Match your machine by model and serial number.
| Model | Serial ranges |
|---|---|
| E35 | SN A93K110001-99999, SN AC2P11001-99999 |
| E42 | SN AG3411001-99999 |
| E45 | SN AG3G11001-99999, SN AHHC11001-99999 |
| E55 | SN ARWM11001-99999, SN ASW311001-99999 |
| 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 |
Frequently asked questions
What does Bobcat code A8207 mean?
It means the ACD/RACD controller lost detection of the solenoid wired to output "C" (controller pin J1 B-13) or its return path (controller pin J1 A-1), and has disabled output "C" as a result.
What is the panel number for A8207?
The numeric panel form of A8207 is 82-07.
Will my attachment still work with code A8207 active?
The function controlled by output "C" will be disabled while the code is active, since the controller shuts that output down when it detects the open circuit.
What usually causes an ACD/RACD output "C" open circuit?
Common causes are an open wire or connection at controller pin J1 B-13 or J1 A-1, a failed output "C" solenoid, a faulty ACD/RACD controller, or moisture, corrosion, or pushed-back pins in any connector along that circuit.
How do I clear code A8207 after fixing it?
Cycle power on the machine, turning the key switch off and then back on, once the repair is complete.
Why does A8207 come and go instead of staying on?
If the fault is intermittent, it may be caused by loose connections, corrosion, or pushed-back pins that only cause an open circuit under certain conditions like vibration or moisture, making the fault hard to pin down if it is not active during testing.
Which Bobcat machines can show code A8207?
Models include the E35, E42, E45, E55 excavators, the S510, S530, S550, S570, S590, S630, S650, S750, and S770 skid steers, and the T550, T590, T630, T650, T750, T770, and T870 compact track loaders.