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HOMESERVICE MANUALSCHEVROLET1995CAVALIER LS, 4D SEDAN, 2.2 4REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 4 (ENGINE CONTROLS - TESTS W/CODES - 4.6L)PCM CODE CHARTSCODE P063, VEHICLE SPEED & SET SPEED DIFFERENCE TOO HIGHNOTES ON INTERMITTENTS
1995 Chevrolet Cavalier LS, 4D Sedan, 2.2 4

Notes On Intermittents

1995 Chevrolet Cavalier LS, 4D Sedan, 2.2 4SECTION Notes On Intermittents
WARNING: This page is about a different car, the 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.

If Code P063 is intermittent, ensure vehicle operator is not overrunning set speed by greater than 20 MPH. Trouble code will not set by vacuum leaks or vacuum supply problem. Trouble code can only be set by vehicle exceeding set speed by 20 MPH.

Fig 1: Code P063 Schematic, Vehicle Speed & Set Speed Difference Too High
G94C33011Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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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.