I did that already, it's not on the list.
If you goto that page it clearly states what code P0520 is
P0520 Jeep
P0520 Jeep - Engine Oil Pressure Sensor/Switch Circuit Malfunction
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Possible causes
- Low oil level or motor mechanical fault
- Faulty oil pressure sensor
- Oil Pressure Sensor harness is open or shorted
- Oil Pressure Sensor circuit poor electrical connection
What does this mean? What does this mean?
When is the code detected?
The P0520 is detected when the circuit from oil pressure sensor to PCM is malfunction
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Oil pressure warning light ON.
P0520 Jeep Description
The PCM continuously monitors the engine oil pressure. The Oil Pressure Sensor/Switch sends a signal to the PCM when the engine is running.
Read more:
http://engine-codes.com/p0520_jeep.html#ixzz3XPa8maM6