P1189 GMC - Engine Oil Pressure Switch Fault
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: 1.0The 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 DescriptionThe 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.
P1189 GMC More InformationNeed more information on how to fix the P1189 GMC code?
Get Access to Factory Service Manuals
Need more help?Get the P1189 Gmc code diagnosed by a professional: Find a repair shop in your area
P1189 GMC CommentsHelp us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P1189 Gmc code? Have you replaced any parts?
Any information is appreciated. Thanks