Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Failure Conditions
1993 Cadillac Seville BaseSECTION Failure Conditions
Failure conditions for PCM code set change depending on whether code was previously set or not.
Code P099 not previously set:
- Cruise control disengaged for 2 seconds.
- Throttle angle greater than 20 degrees, TP sensor not failed.
- MAP greater than 70 kPa, TP sensor failed.
- Cruise control servo stroke greater than 63 percent for 0.1 second.
Code P099 previously set:
- Cruise control disengaged for 2 seconds.
- Throttle angle greater than 16 degrees, TP sensor not failed.
- MAP greater than 55 kPa, TP sensor failed.
- Cruise control servo stroke greater than 38 percent for 0.1 second.
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.