1996 Geo Prizm Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Clearing DTCS

CAUTION: To prevent damage to PCM when clearing DTCs, ignition switch must be in LOCK position when disconnecting and connecting power to PCM.

To clear DTCs using scan tool, select CLEAR DTCs or CLEAR INFORMATION function. Follow scan tool manufacturer's instructions.

If a scan tool is not available, DTCs can be cleared by disconnecting one of the following power sources for at least 30 seconds:

  • Power source to PCM (such as battery pigtail, relay, fuse, etc).
  • Negative battery cable (loss of radio presets and/or clock settings will result).
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.