Bobcat A8206 (82-06) Fault Code: ACD/RACD Output “C” Short to Ground
Also shown on the panel as 82-06 · Also called ACD Output ‘C’ Short to Ground, ACD/RACD Output “C” Short to Ground
ACD/RACD Output “C” Short to Ground · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
A8206 (panel code 82-06) sets when the ACD/RACD controller commands Output "C" but does not detect voltage on that output circuit, controller pin J1 B-13, or its return wire, controller pin J1 A-1. The controller disables Output "C" when this happens.
Medium severity. Output "C" is disabled once the code sets, which means whatever attachment function runs through that output will not work. This does not indicate an immediate safety emergency, but it should be diagnosed before relying on that attachment function.
What does Bobcat error code A8206 mean?
A8206 is a Bobcat attachment control diagnostic (ACD) or remote attachment control diagnostic (RACD) code. It fires when the controller sends a command to Output "C" and expects to see voltage on that output circuit, controller pin J1 B-13, or on its return path at controller pin J1 A-1, but does not detect it as expected.
Because the controller cannot confirm the output is behaving correctly, it shuts Output "C" down as a protective measure. Any attachment function wired through this output will stop working until the fault is found and cleared.
This is an electrical circuit fault, not a hydraulic or engine fault by itself, though the output may control a solenoid that affects an attachment's hydraulic function.
Common causes of A8206
- Output "C" wiring, controller pin J1 B-13, or the return wire at controller pin J1 A-1, shorted to ground.
- Output "C" solenoid failure.
- ACD/RACD controller fault.
- 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: if the code is not active at the time of testing, the cause may not be found immediately. Probable causes in this case include loose connections, corrosion, pushed-back pins, the controller itself, the wire harness, or a combination of these problems.
How to troubleshoot Bobcat A8206: first checks
- With the key switch in the run/enter position (the condition under which this code sets), check for stored or active codes and confirm whether A8206 is currently active or was logged as intermittent.
- Inspect the ACD/RACD controller connectors, the mainframe harness, and the attachment control harness for moisture, corrosion, or pushed-back pins, especially near controller pin J1 B-13 and pin J1 A-1.
- Check the Output "C" solenoid and its wiring for a short to ground, both at the solenoid connector and along the harness back to the controller.
- If the code is not active during testing, wiggle-test the harness and connectors while watching for the fault to reappear, since intermittent shorts from loose or corroded connections may not show up with the machine sitting still.
- If wiring and solenoid check out, suspect the ACD/RACD controller itself.
How the code clears
Cycle power to clear the code once the repair is complete. No other reset procedure is listed for this code.
Affected models and serial ranges
A8206 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 A8206 mean?
It means the ACD/RACD controller commanded Output "C" but did not detect the voltage it expected on that output circuit (controller pin J1 B-13) or its return wire (controller pin J1 A-1). The controller then disables Output "C".
What is the panel display version of A8206?
On the Bobcat display panel, this code shows as 82-06.
Why did my attachment function stop working after this code appeared?
Because A8206 causes the controller to disable Output "C" as a protective response. Whatever attachment function is wired through Output "C" will not operate until the underlying short to ground is found and fixed.
Will the code stay on if the short is intermittent?
Not necessarily. If the short to ground is intermittent, the code may not be active when you check it. In that case the cause could still be a loose connection, corrosion, pushed-back pins, the controller, or the harness, and it may take a wiggle test or repeated operation to catch it in the act.
How do I clear A8206 after fixing it?
Cycle power to the machine once the repair is complete. No other reset procedure is listed.
Which Bobcat machines can show code A8206?
It applies across a range of Bobcat compact excavators and skid-steer/track loaders, including the E35, E42, E45, E55, S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, and T770 models.
Is A8206 a hydraulic problem?
No. It is an electrical circuit fault in the ACD/RACD attachment control system, specifically a short to ground on Output "C" or its return wire. It can affect a solenoid that controls a hydraulic attachment function, but the fault itself is electrical.