Clearing Trouble Codes

1997 Chevrolet Forward Control 5.7 R, AutomaticSECTION Clearing Trouble Codes

DTCs can be cleared using scan tool. If scan tool is not available, turn ignition switch to OFF position. Remove control module fuse from fuse block for 30 seconds. Replace fuse. If fuse cannot be located, disconnect PCM/TCM pigtail at battery for 30 seconds. Codes may also be cleared by disconnecting negative battery cable. However, this may result in loss of other on-board memory data, such as preset radio tuning. After power to PCM/TCM is removed, poor driveability may occur until control module "relearns" operating parameters.

DTCs will also be cleared under the following conditions: PCM/TCM will turn off MIL after 3 consecutive ignition cycles without a failure reported. PCM/TCM will cancel DTC default actions when fault no longer exists and ignition is cycled off long enough to power down PCM/TCM. DTC will be cleared when vehicle has achieved 40 warm-up cycles without a failure reported.

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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.