Test Conditions

1991 Cadillac Seville STSSECTION Test Conditions

Codes EO14, EO15, EO16, EO21, EO22, EO26, EO27, EO31, EO32, and EO34 not set. Throttle switch open, throttle angle 6-30 degrees, coolant temperature greater than or equal to 136°F (58°C), oxygen sensor ready (closed loop), engine speed greater than or equal to 800 RPM and canister purge has occurred at full duty cycle 10 minutes since engine was running with coolant 176°F (80°C) and throttle angle 10 degrees or greater.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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

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