P0191: Fuel Rail Pressure (FRP) Sensor Circuit Performance.
This could be triggered by either high or low fuel pressure, Damaged or faulty sensor or even a vacuum leak.
P0197: Engine oil temperature sensor circuit low input.
This could be triggered for damaged harness, damaged connector, faulty sensor.
If the temperature sensors provides incorrect data, then the engine will shut off. You need to check the sensor to make sure it is good.
I have attached the basic diagnostics for those codes for your reference.
Please let me know if this helps.
Thank you.
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Thursday, July 29th, 2021 AT 9:27 AM