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HOMESERVICE MANUALSBUICK1986SKYLARK LIMITED, 3.0 LREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - TBIOPERATIONDATA SENSORSELECTRICALLY HEATED O2 SENSOR
1986 Buick Skylark Limited, 3.0 L

Electrically Heated O2 Sensor

1986 Buick Skylark Limited, 3.0 LSECTION Electrically Heated O2 Sensor

Electrically heated O2 sensor is used on 4.3L engine. This sensor is energized by fuel pump relay and remains on as long as engine is running. Failure of heating element, power feed or ground circuit may cause Code 13 to be set at idle or low RPM.

NOTE: No attempt should be made to measure O2 sensor voltage output. Current drain of conventional voltmeter could permanently damage sensor, shift sensor calibration and/or render sensor unusable. DO NOT  connect jumper wire, test leads or other electrical connectors to sensor.
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.