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Home >> Cadillac >> 1998 >> Seville SLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P1617 - Engine Oil Level Switch Circuit >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK , then go to next step.
  2. Check engine oil level. If engine oil is higher than normal level, go to step 7). If engine oil level is okay, go to next step.
  3. Install scan tool. Start engine. Ensure transmission is in Park. Using scan tool, view engine oil level. Increase engine speed to 2000 RPM. If scan tool indicates that oil level is low, fault is not present. If scan tool indicates that oil level is not low, go to next step.
  4. Disconnect oil level switch connector. If scan tool indicates that oil level is low, go to step 8). If scan tool indicates that oil level is not low, go to next step.
  5. Using scan tool, record oil life index. Turn ignition off. Wait 30 seconds, then disconnect PCM harness connector C2. Using DVOM, check resistance between ground and PCM harness connector C2 terminal No. 58. If resistance is 10,000 ohms or less, go to next step. If resistance is not 10,000 ohms or less, go to step 9).
  6. Repair short to ground in oil level input circuit.
  7. Drain excess engine oil.
  8. Replace engine oil level switch.
  9. Replace PCM. Program replacement PCM using required equipment.
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