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Home >> Saturn >> 2000 >> SC2 Automatic, MP6 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0038: Ho2S Heater Control Circuit High >> Diagnostic Procedures
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Diagnostic Procedures

  1. Connect scan tool. Start engine and operate for one minute. Using scan tool, monitor HO2S HEATER - LOW VOLT or HO2S HEATER - OPEN test. If test fails, go to next step. If test does not fail, see DIAGNOSTIC AIDS  .
  2. Raise and support vehicle. Disconnect HO2S2 harness connector. Connect Noid Light (SA9194E) between HO2S2 harness connector terminals "C" (Black/White wire) and "D" (Pink wire). Using scan tool, monitor HO2S HEATER - LOW VOLT or HO2S HEATER - OPEN test. If test does not fail, check Black/White wire for short to voltage or PCM. If test does not pass, replace HO2S2.
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