P2256 Proton Gen2 OBD Code

OBD/2 P2256 error code description and symptoms.

The Throttle Position sensor signals the Engine Control Module as to the current position of the engine throttle valve.
The current throttle valve opening is based on the driver's input from the gas pedal. The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

P2256 Proton Gen2 Error Code Repair Process :

If your vehicle failed a P2256 test and the P2256 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses p2256 o2 sensor negative current control circuit high bank 2 sensor 1 a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look p2256 o2 sensor negative current control circuit high bank 2 sensor 1 : Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

Common Causes of Proton Gen2 P2256 OBD2 Code

A common cause of code P2256 is the failure of P2256 O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 , but there are several other possible causes as well, such as ;

Damaged ECM
Engine Control Module (ECM)
Fuel injectors may be faulty
Ignition coils harness is open or shorted

P2256 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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P2256 Proton Gen2 OBD Code

P2256 Proton Gen2 Error Code Repair Process :

Common Causes of Proton Gen2 P2256 OBD2 Code

P2256 code for other Proton cars