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The P0300 code indicates misfires on random cylinders. Here is a list of possible causes.
P0300 INFINITI - Cylinder Misfire Detected Random Cylinders Read more: https://www.autocodes.com/p0300_infiniti.html
The code P2A00 indicates an issue with Air/fuel sensor. Here is a list of possible causes.
P2A00 INFINITI - Air Fuel Ratio Sensor Circuit Range/Performance Bank 1 Sensor 1 Read more: https://www.autocodes.com/p2a00_infiniti.html
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