What does Mantis fault code M01 / M02 mean?

Q: What does Mantis fault code M01 / M02 mean?

M01 / M02 indicates: Crawler tracks move slowly or not at all; Engine doesn't "rev up" when traveling. Fix: Travel High/Low Solenoid Fault. LOGIC: The machine controller is attempting to shift the travel motors into high-speed mode but detects an open circuit in the solenoid coil. ACTION: 1. Locate the travel solenoids near the swivel. 2. Ohm-test the coils (should be 20-40 ohms). FIX: Replace the Travel Speed Solenoid Coil or repair the harness at the swivel.

Mantis Fault Code

Free · no signup

M01 / M02

Crawler tracks move slowly or not at all; Engine doesn't "rev up" when traveling.

System

Mantis Logic

Symptom

Crawler tracks move slowly or not at all; Engine doesn't "rev up" when traveling.

Diagnosis & fix steps

Travel High/Low Solenoid Fault. LOGIC: The machine controller is attempting to shift the travel motors into high-speed mode but detects an open circuit in the solenoid coil. ACTION: 1. Locate the travel solenoids near the swivel. 2. Ohm-test the coils (should be 20-40 ohms). FIX: Replace the Travel Speed Solenoid Coil or repair the harness at the swivel.

Red Seal field insights

These solenoids are down low near the tracks and often get hit by brush or debris. If the wires look "pulled," you’ve likely caught a branch. Always zip-tie these wires high and tight to the frame.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

Book an uptime review

Read before you touch anything

This is general reference information, not a repair manual. It is for trained, qualified technicians.
Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

Track this across your whole fleet

This code is free to read. AM Fleet Integrity lets your team log fault codes against assets, plus the full fault-code library, QR operator reporting, PM scheduling and predictive alerts. Start free — no credit card required.

Start your free trial

Related Mantis fault codes

← All Mantis fault codes