P1189 GMC - Engine Oil Pressure Switch Fault

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
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P1189 GMC Possible Causes

  • Faulty Engine Oil Pressure Switch
  • Engine Oil Pressure Switch harness is open or shorted
  • Engine Oil Pressure Switch circuit poor electrical connection

First diagnose P1189 GMC code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P1189 GMC code

    Labor: 1.0

    The cost of diagnosing the P1189 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

P1189 GMC Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1189 Gmc Description

The low oil pressure sensor is normally closed. When oil pressure increases above 1 to 4.5 psi the switch contacts open. The Powertrain Control Module (PCM) supplies 12 volts to the oil pressure input circuit. With low oil pressure the 12 volts is pulled low to ground. This diagnostic tests for a open condition of the oil pressure switch circuit. If the engine has been off long enough for engine temperature to drop by 10°C, then a shorted (low oil pressure) condition of the circuit should be observed prior to engine running.
OBDII Code P1189 Gmc - Engine Oil Pressure Switch Fault - AutoCodes.com

P1189 GMC More Information

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