RAM Fault Code

Free · no signup

C0031

ABS / Service 4WD / Traction Off.

System

Chassis (ABS)

Symptom

ABS / Service 4WD / Traction Off.

Diagnosis & fix steps

LOGIC: Left Front Wheel Speed Sensor Circuit. ACTION: Inspect the sensor pigtail at the hub. Check for a 12V supply. If the harness is intact, replace the hub-mounted sensor.

Red Seal field insights

Specs: Gap between sensor and tone ring should be tight and debris-free. RED SEAL FIX: On the front, the harness "flexes" every time you turn the wheel. Look for a "stiff" spot in the wire—that’s where the copper has snapped inside the insulation.

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 RAM fault codes

← All RAM fault codes