Ford F150 P0420 Check Engine Code

P0138 code: o2 sensor circuit high voltage (bank 1, sensor 2) Code p0401 egr flow insufficient fixed ! P0401 error code

P0138 Code: O2 Sensor Circuit High Voltage (Bank 1, Sensor 2) - In The

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P0138 Code: O2 Sensor Circuit High Voltage (Bank 1, Sensor 2) - In The

P0401 Error Code - Ford Truck Enthusiasts Forums