Case Fault Code
Free · no signupB012
Hydraulic Surge.
System
Not specified
Symptom
Hydraulic Surge.
Diagnosis & fix steps
LOGIC: P1 Pump Pressure Sensor Voltage High.
ACTION: Check for a short to power in the sensor harness; swap P1 and P2 sensors to verify.
Red Seal field insights
Pro-Tip: If the code moves when you swap sensors, the transducer is shot. If it stays at P1, check the grounding pin in the main controller (MC) plug.
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.
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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