1986 Cadillac SevilleFACTORY OEM SERVICE PROCEDURE

Notes On Intermittents

If code "E013" is a hard code, start engine and enter diagnostics. Operate at fast idle until "AUTO" closed loop status light is turned on. Observe parameter while manipulating circuit Nos. 412 and 413 wiring. If parameter PD07 changes from fluctuating to fixed at about .45 volts, repair intermittent open circuit.

Check circuit No. 413 ground to engine for proper installation (clean, tight and star washer installed). Ground for circuit No. 413 is attached to front of engine at right or rear of cylinder head.

Fig 1: Hard or Intermittent Trouble Code E013 - O2 Sensor Not Ready
G201969

NOTE: If Code E013 Is Accompanied By Hard Or Intermittent

Code E044 Or E045, See DFI Chart A-6

Fig 2: Hard or Intermittent Trouble Code E013 - O2 Sensor Not Ready (1 of 3)
GB0020700
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.