Bobcat M0613 (06-13) Fault Code: Engine Speed No Signal
Also shown on the panel as 06-13
Engine Speed No Signal · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
M0613 (panel code 06-13) sets when the gateway controller gets no signal from the engine speed sensor for 30 seconds while engine oil pressure is present. Drive functions get disabled, and depending on the machine and software version the cooling fan either runs at full speed or stops running entirely. Treat it as a stop-and-diagnose situation, not a keep-working code.
High severity. Drive functions are disabled as soon as this code sets, which stops the machine from working. Some versions also stop the cooling fan, which risks engine overheating if the machine keeps running. This is not a code to ignore or drive through.
What does Bobcat error code M0613 mean?
M0613 is an engine speed signal loss code on Bobcat loaders and compact track loaders. The gateway controller watches for a signal from the engine speed sensor. If that signal goes missing for 30 seconds while the engine oil pressure sensor shows pressure present (meaning the engine is actually running), the controller concludes the speed signal path has failed rather than the engine itself.
When this code sets, the machine disables drive functions immediately. That is a built-in safety response, since the controller can't trust engine speed data to safely manage machine functions. Depending on the model and software, the cooling fan will either run at full speed as a fail-safe cooling measure, or in some versions it stops running altogether, which raises overheating risk if the engine keeps running.
The code is self-resetting, meaning it will clear on its own once the controller sees a valid engine speed signal again with oil pressure present. There is no separate manual reset procedure required beyond fixing the underlying wiring or sensor fault.
What triggers a Bobcat M0613 code?
The gateway controller sets M0613 when it detects no signal from the engine speed sensor for 30 seconds while the engine oil pressure sensor indicates oil pressure is present. The conditions for the code to be active are: key switch (run/enter) on, and engine running.
Common causes of M0613
- Engine speed sensor improperly adjusted (gap or position out of spec)
- Ground wire open (wire 2160 or 3610 depending on model/harness variant)
- Signal wire shorted to supply voltage, shorted to ground, or open (wire 3160 or 3600 depending on variant)
- Faulty engine speed sensor itself
- Engine oil pressure sensor 5-volt supply wire shorted to supply voltage or shorted to ground (wire 5140 or 3500 depending on variant)
- Faulty engine oil pressure sensor
- Faulty gateway controller
- Moisture, corrosion, or pushed-back pins in the gateway controller connectors, engine oil pressure switch connector, engine speed sensor connector, or mainframe wire harness
- Intermittent fault not present at time of testing: could be loose connections, corrosion, pushed-back pins, the controller, the wire harness, or a combination of these
How to troubleshoot Bobcat M0613: first checks
- Confirm the engine speed sensor is properly adjusted and securely mounted, since an out-of-spec gap is a listed cause
- Inspect the engine speed sensor connector, gateway controller connectors, engine oil pressure switch connector, and mainframe wire harness for moisture, corrosion, or pushed-back pins
- Check the ground wire for the engine speed sensor circuit for continuity and confirm it is not open
- Check the signal wire from the engine speed sensor for shorts to supply voltage, shorts to ground, or an open circuit
- Check the engine oil pressure sensor's 5-volt supply wire for shorts to supply voltage or ground, since a fault here can also trigger this code
- Test the engine oil pressure sensor and engine speed sensor individually if wiring checks out clean
- If the code is intermittent and not active during testing, wiggle-test connectors and harness sections while watching for the fault to reappear, since loose connections and pushed-back pins are common intermittent causes
How the code clears
M0613 is self-resetting. Once the gateway controller detects a valid signal from the engine speed sensor along with oil pressure present, the code clears on its own. No separate manual reset procedure is listed for this code, but the underlying wiring, connector, or sensor problem must be repaired first or the code will return.
Affected models and serial ranges
M0613 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-ATZC99999 |
| 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 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 M0613 mean?
It means the gateway controller lost the signal from the engine speed sensor for 30 seconds while the engine oil pressure sensor showed pressure present, meaning the engine was running but the controller couldn't read engine speed.
Can I keep driving or working with M0613 active?
No. Drive functions are disabled as soon as M0613 sets. On top of that, cooling fan behavior changes (full speed or stopped, depending on the machine), so continuing to run the engine can risk overheating.
Will M0613 clear itself once I fix the problem?
Yes. It is listed as self resetting. Once the controller sees a proper engine speed signal along with oil pressure present, the code clears without a manual reset procedure.
What usually causes M0613?
Most common causes are a misadjusted or failed engine speed sensor, an open ground wire, a shorted or open signal wire, corrosion or pushed-back pins in connectors, or less often a bad oil pressure sensor, its 5-volt supply wire, or the gateway controller itself.
Why does the cooling fan behave differently when M0613 sets?
Different Bobcat models and software versions handle it differently. Some run the fan at full speed as a fail-safe, others stop the fan entirely. Either way it signals the controller has lost trust in engine speed data and is reacting accordingly.
Is M0613 an intermittent problem sometimes?
Yes, it can be. If the fault isn't present when you test it, the cause may be intermittent, most often loose connections, corrosion, or pushed-back pins in the connectors rather than a fully failed component.
Which Bobcat models can show code M0613?
It applies to a range of Bobcat loaders and compact track loaders, including S510, S530, S550, S570, S590, S630, S650, S750, S770, T550, T590, T630, T650, T750, and T770/T870 models.