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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 239 (ENGINE CONTROLS SELF-DIAGNOSTICS - 3.1L ENGINE)DIAGNOSTIC TESTSP0130: HO2S 1 CIRCUIT CLOSED LOOP PERFORMANCECONDITIONS FOR RUNNING TEST
1999 GMC Forward Control 5.7 R, Automatic

Conditions For Running Test

1999 GMC Forward Control 5.7 R, AutomaticSECTION Conditions For Running Test
WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Malibu, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  • DTCs P0101, P0102, P0103, P0107, P0108, P0116, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0131, P0132, P0133, P0134, P0135, P0410, P0440, P0442, P0443, P0446, P0449, P1133, P1134 or P1441 are not set.
  • The Engine Run Time parameter is at least 4 minutes.
  • The MAF sensor parameter is between 8-35 g/s.
  • The engine speed is 550-3000 RPM.
  • The TP sensor parameter is 3-35 percent.
  • The ECT sensor parameter is more than 158°F (70°C).
  • The system voltage is 9-18 volts.
RENDER: 1.0x

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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.