Generic Fault Code

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P0113

High Fuel Consumption

Variant 1

System

Air Intake

Symptom

High Fuel Consumption

Diagnosis & fix steps

LOGIC: Intake Air Temp (IAT) Circuit High. ACTION: Check for a disconnected sensor. Measure resistance across sensor pins.

Red Seal field insights

Logic: "Circuit High" usually means an open circuit (infinite resistance). The ECM defaults to −40°C.

Variant 2

System

Air Intake

Symptom

Black Smoke on Startup

Diagnosis & fix steps

LOGIC: Intake Air Temperature Circuit High Input. ACTION: Check for an open circuit in the sensor element or the signal return wire. An open circuit mimics extreme cold.

Red Seal field insights

Physics: The PCM thinks the ambient air is sub-zero and aggressively enriches the startup fueling.

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.

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