This refers to the second oxygen sensor on Bank 1. Bank 1 is the same side of the engine that cylinder 1 is on, the very front cylinder on the drivers side. It could need to be replaced, or there could be a short to voltage on the O2 signal circuit, or it could also be that the connector has been corroded, and needs to just be cleaned. I believe this code is the same for all vehicles.
Trouble code P0136 means: O2 Circuit (Bank 1, Sensor 2)
Trouble code P0136 means: O2 Circuit (Bank 1, Sensor 2)
Trouble code P0136 means:O2 sensor circuit malfunction (Bank 1 Sensor 2)
Code P0136 is the code set for your O2 Sensor that is located after your Catalytic Converter.
The diagnostic code PO735 on a Mercury Mountaineer indicates that the 5th gear has an incorrect gear ratio. This can be the result of a broken servo shaft.
Trouble code P0136 means:O2 sensor circuit malfunction (Bank 1 Sensor 2)
Trouble code P0420 means: Catalyst system efficiency below threshold (bank 1)
Trouble code P0136 means: HO2S-12 (Bank 1 Sensor 2) Circuit Malfunction
Trouble code P0301 means: Cylinder 1 Misfire Detected
warning code check faults indicated by subsequent codes
Trouble code P0171 means:System too lean (Bank 1)
It means you need to go to Autozone or Shucks/Kraagen and have them read the codes with the diagnostic code reader which they will usually do free of charge. Something in or on the engine is malfunctioning and needs repair/replacement. The diagnostic code will tell you where to look for the problem. Oxygen sensor is an example of typical problem discovered but all engine sensors are monitored.