Caterpillar Fault Code

Free · no signup

2266-7

Pump #2 Outlet Pressure Sensor: Not Responding

Variant 1

System

Hydraulic

Symptom

Pump #2 Outlet Pressure Sensor: Not Responding

Diagnosis & fix steps

LOGIC: Static signal on Pump 2. ACTION: Check for air in the pilot lines or a failed transducer internal diaphragm.

Red Seal field insights

Usually caused by a "slug" of debris or air lock after a hose replacement.

Variant 2

System

Hydraulic

Symptom

Erratic Main Pump Response

Diagnosis & fix steps

LOGIC: Pump #2 Outlet Pressure Sensor Not Responding. ACTION: Perform "Pressure Sensor Calibration" in CAT ET. If it fails, check for a blocked sensor orifice.

Red Seal field insights

Specs: Signal should be 0.5V at rest (atmospheric) and up to 4.5V at full stroke.

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 Caterpillar fault codes

← All Caterpillar fault codes