Bobcat H4013 (40-13) Fault Code: Right CAN Joystick Grip No Communication
Also shown on the panel as 40-13 · Also called Right CAN Joystick Grip no Communication, Right Joystick Grip No Communication
Right CAN Joystick Grip No Communication · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
H4013 (panel code 40-13) sets when the auxiliary controller loses communication between the right joystick grip and the right joystick base. Auxiliaries are disabled until the fault clears. It can also be triggered by the right thumb paddle switch being out of neutral at key-on.
Medium severity. The machine will still drive, but auxiliary hydraulic functions run through the right joystick are disabled, which stops attachment work until the fault is fixed. Not an engine or structural safety risk, but it does stop productive work and should be diagnosed before returning to service.
What does Bobcat error code H4013 mean?
H4013 is a communication fault on Bobcat loader and compact track loader models. The auxiliary controller expects a steady digital signal between the right joystick grip (the handle with the thumb paddle and buttons) and the right joystick base (which houses the wiring connection point into the machine harness). When that link drops out, the controller cannot verify the joystick's commands are valid, so it disables the auxiliary hydraulic functions as a safety measure.
This code can also be set simply because the thumb paddle switch on the right joystick was out of neutral position at the moment the key switch was turned to run/enter. The controller checks switch position at key-on, and if it does not read neutral, it will not trust the joystick and will flag the fault.
Because the fault is tied to a physical connection and a switch position check, it often shows up as intermittent, especially if it is caused by vibration, moisture, or a marginal connector rather than a fully failed part.
Common causes of H4013
- Right joystick thumb paddle switch out of neutral position when the key switch (run/enter) is turned on
- Fault in the right joystick grip itself
- Fault in the right joystick base
- Damaged or open wire harness between the right joystick grip and the right joystick base
- Moisture, corrosion, or pushed-back pins in the right joystick assembly connectors
- Possible wire pinch at the air ride seat power connector (listed as a component to check on affected models)
- Intermittent causes that may not be found while testing, including loose connections, corrosion, pushed-back pins, the controller itself, the wire harness, or a combination of these
How to troubleshoot Bobcat H4013: first checks
- Cycle the key switch off, confirm the right joystick thumb paddle switch is sitting in neutral, then turn the key switch back to run/enter and see if the code clears
- Inspect the right joystick grip and base connectors for moisture, corrosion, or pins that have pushed back out of their sockets
- Trace the wire harness between the right joystick grip and right joystick base for chafing, pinches, or loose connections
- Check the air ride seat power connector area for a pinched wire, since this has been identified as a possible cause on affected models
- If the code is not active during testing, wiggle-test the harness and connectors around the joystick and seat area to try to reproduce an intermittent dropout
How the code clears
Bobcat lists this code as self resetting. No separate clearing step is listed beyond correcting the underlying cause, such as returning the thumb paddle switch to neutral, repairing the harness, or cleaning up corroded or pushed-back pins. Once the communication fault and any switch-position issue are resolved, the auxiliary controller should clear the fault on its own.
Affected models and serial ranges
H4013 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 H4013 mean?
It means the auxiliary controller cannot communicate with the right joystick grip through the right joystick base. Because the controller cannot verify the joystick signal, it disables the auxiliary hydraulic functions until the issue is resolved.
Why did H4013 come up when I started the machine?
If the right joystick's thumb paddle switch was out of neutral when you turned the key switch to run/enter, the controller will not trust the joystick and will set H4013. Make sure the paddle switch is in neutral before start-up.
Will H4013 stop my machine from driving?
No. H4013 disables auxiliary hydraulic functions controlled by the right joystick, not the drive system. You can typically still drive the machine, but attachment functions tied to the right joystick will not work.
Does H4013 clear itself?
Bobcat lists the clearing condition as self resetting. Once the thumb paddle switch is in neutral and any wiring, connector, or corrosion issue is fixed, the code should clear without a separate manual reset procedure.
Why does H4013 keep coming and going instead of staying on?
Intermittent H4013 codes are commonly caused by loose connections, corrosion, or pushed-back pins in the joystick connectors, or a marginal wire harness. These conditions can come and go with vibration or temperature changes, which can make the root cause hard to catch during a single test session.
What is the air ride seat power connector's connection to this code?
On some affected models, a pinched wire at the air ride seat power connector has been identified as a possible cause of H4013. It is worth inspecting that connector area even though the fault is centered on the right joystick's communication link.