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HOMESERVICE MANUALSPONTIAC19876000 SE, 4D WAGON, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEM2.0L VIN [K] / 2.5L VINS [R & U] TESTS W/CODESDIAGNOSTIC CHARTSCODE 13 - OPEN OXYGEN (O2) SENSOR CKT (A/J/N/P BODY)DIAGNOSTIC AIDS
1987 Pontiac 6000 SE, 4D Wagon, Standard

Diagnostic Aids

1987 Pontiac 6000 SE, 4D Wagon, StandardSECTION Diagnostic Aids

Verify a clean, tight ground connection for circuit No. 413. An open circuit at terminal No. 412 or No. 413 will result in a Code 13.

Fig 1: Code 13 Schematic: Open O2 Sensor Circuit (A/J/N/P Body)
G50H06656
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.