Chevrolet P1189: Engine Oil Pressure Switch Circuit Malfunction
Is your scanner showing Chevrolet P1189?
No worries. We'll show you what it means and how to deal with it.
Chevrolet P1189: Engine Oil Pressure Switch Circuit Malfunction
OVERVIEWWhat Does The Chevrolet P1189 Code Mean?
Engine started, ECT sensor less than 50ºF at last key off, and the PCM detected an open EOP switch circuit for 10 seconds.
What Are The Potential Causes Of The Chevrolet P1189 Code?
Below are some potential causes of this DTC:
- EOP switch circuit is open between the sensor and the PCM
- Engine oil pressure switch is damaged (possible open circuit)
- PCM has failed
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> ACDelco Professional 213-4514 Engine Coolant Temperature Sensor
>>> GM Genuine Parts 12633238 Engine Control Module
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
GM, 2013, Service Bullettin – Prior To Any Circuit Testing.
