In our forums, user dechevarria02 asked about code P0136. This is a very common engine code and is usually easily diagnosed and fixed. Remember, when your engine light comes on, most auto parts stores and many repair shops will read the codes for free.
P0136 is Oxygen Sensor Circuit Low Voltage (B1, S2). This is the second O2 sensor in bank one (the side of the engine with cylinder 1). This sensor will be present on most modern engines of six cylinders or more.