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.
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