As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED NO FUEL PRESSURE INDICATION ON DISPLAY. FOUND FUEL PRESSURE TRANSDUCER MOUNTED UNDER LT MAGNETO WITH WIRING FACING UP. INSPECTION REVEALED UNIT TO BE OIL-SOAKED DUE TO PRIOR MAGNETO REPLACEMENT. SUSPECT OIL MIGRATED INTO WIRING AND SHORTING OUT UNIT. REPLACED TRANDUCER WITH NEW AND OPS CK GOOD. NEW UNIT WIRING EXTERNALLY SEALED WITH RTV TO PREVENT FUTURE PROBLEMS.