OBD-II code · Powertrain (generic)
P0523 Engine Oil Pressure Sensor or Switch A High
Same as P0520 with the signal voltage above the plausible range - usually a short to supply or sensor failure that pegs the output high.
Is it safe to drive with P0523?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal shorted to supply
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.4 h
- Emissions test
- Usually unaffected
- Parts involved
- Oil Pressure Sensor A
Related codes
- P055DEngine Oil Pressure Sensor or Switch B High
- P0520Engine Oil Pressure Sensor or Switch A Circuit
- P0521Engine Oil Pressure Sensor/Switch Range/Performance
- P0522Engine Oil Pressure Sensor/Switch Low Voltage
- P0524Engine Oil Pressure Too Low
- P0525Cruise Control Servo Control Circuit Range or Performance
- P0526Fan Speed Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.