Hi there,
P0135 indicates an issue with the O2 sensor. This can affect your fuel mileage. Here is some more info for you.
P0135 HONDA - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1 Read more: https://www.autocodes.com/p0135_honda.html
P0797 indicates an issue with the pressure control solenoid C. This will affect the transmission. Here is some more info for you.
P0797 HONDA - Pressure Control Solenoid 'C' Stuck On Read more: https://www.autocodes.com/p0797_honda.html
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