Bobcat D7537 (75-37) Fault Code: 5.0 Volt Sensor Supply 1 Out of Range Low
Also shown on the panel as 75-37 · Also called 5.0 Volt Sensor Supply 1 Out Of Range Low, Drive 5 Volt Sensor Supply 1 Out of Range Low
5.0 Volt Sensor Supply 1 Out of Range Low · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
D7537 sets when the drive controller sees its 5 volt sensor supply 1 drop below 4.75 volts. This supply feeds the left and right wheel speed sensors, so when it drops out of range, the machine disables drive functions until the fault clears. On the panel it shows as 75-37.
High severity. Drive functions are disabled while this code is active, so the machine cannot be operated normally. It is not an engine-damage code, but it stops work until fixed, which puts it at High rather than Critical.
What does Bobcat error code D7537 mean?
D7537 is a Bobcat drive controller code that fires when sensor supply 1, a 5 volt reference feed, is measured at less than 4.75 volts. This supply line powers the left and right wheel speed sensors that the drive controller uses to manage traction and drive control.
The same 5 volt supply is also wired to the swash plate sensor connectors on affected machines, but that connection is not actually used for anything. It is only mentioned because it is physically tied into the same circuit and can be a place moisture or corrosion gets in.
When the drive controller sees the supply sag below its threshold, it assumes the sensor circuit is compromised and disables drive functions as a protective measure. That means the machine will not drive normally until the underlying electrical fault is found and cleared.
What triggers a Bobcat D7537 code?
The code sets when the key switch (run/enter) is on and the drive controller measures sensor supply 1 at less than 4.75 volts.
Common causes of D7537
- Sensor supply 1 wire (numbered 5980 on some machines, 1640 on others depending on model) shorted to ground
- A problem at the swash plate sensor connectors, even though that circuit is unused, because it shares the same supply wiring
- A fault in the right or left wheel speed sensor
- A fault in the drive controller itself
- Moisture, corrosion, or pushed-back pins in the drive controller connectors, the SJC harness, or the jumper harnesses that run between the sensors and the SJC harness
- An intermittent condition where the fault is not present at the time of testing, which can be caused by loose connections, corrosion, pushed-back pins, the controller, the wire harness, or a combination of these problems
How to troubleshoot Bobcat D7537: first checks
- With the key switch on, check for the code and note whether it is active or intermittent before disturbing anything
- Inspect the drive controller connectors, SJC harness connectors, and jumper harnesses between the wheel speed sensors and the SJC harness for moisture, corrosion, or pins that have pushed back out of their sockets
- Check the sensor supply 1 wire (5980 or 1640 depending on model) for a short to ground using standard wiggle and continuity testing with the harness disconnected
- Inspect the swash plate sensor connectors even though that circuit is unused, since it shares the same 5 volt supply and can drag the whole circuit down if it is shorted or corroded
- Check the left and right wheel speed sensors and their connectors for damage or contamination
- If the code will not reproduce during testing, treat it as intermittent and focus on loose connections, corrosion, and pushed-back pins as the most likely culprits before suspecting the controller itself
How the code clears
The code is self resetting. No separate clearing step is listed, so once the underlying wiring, connector, or sensor fault is repaired and the 5 volt supply reads back within range, the code should clear on its own.
Affected models and serial ranges
D7537 appears in our records across 15 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 |
| 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 |
| T770 | SN A3P811001-899999, SN A3P911001-999999 |
| T870 | SN A3PG11001-99999, SN A3PH11001-99999 |
Frequently asked questions
What does Bobcat code D7537 mean?
It means the drive controller detected that its 5 volt sensor supply 1, which feeds the left and right wheel speed sensors, dropped below 4.75 volts. When this happens the controller disables drive functions.
Can I keep driving with code D7537 active?
No. Bobcat's own description states that drive functions are disabled when this code is active, so the machine will not operate normally until the fault is cleared.
What is the panel display number for D7537?
It shows as 75-37 on the numeric panel display.
Does the swash plate sensor have anything to do with this code?
The swash plate sensor connectors share the same 5 volt supply wiring, but that connection is not actually used. It is worth inspecting anyway because a short or corrosion there can pull down the whole supply circuit.
Do I need to manually clear code D7537 after repair?
No separate clearing procedure is listed. The code is self resetting once the supply voltage is back in range.
Why does my D7537 code come and go instead of staying on?
An intermittent code usually points to loose connections, corrosion, or pushed-back pins in the connectors rather than a solid short or a failed controller. If the fault is not present during testing, it may not be reproducible right away.
Which wire should I check first for D7537?
Check sensor supply 1, which is wire 5980 on some models and wire 1640 on others, for a short to ground. Which number applies depends on your specific model and harness variant.