Code P2133 indicates that the engine computer has detected a higher than normal voltage on the 'F' signal circuit of the accelerator pedal position sensor. This high voltage disrupts the redundant signal the computer uses to track pedal position, often forcing the vehicle into a reduced power or limp mode to prevent unintended acceleration.
Internal circuit failure within the sensor itself can cause the signal line to short to voltage or lose its ground reference, resulting in a high voltage reading.
The signal wire for the 'F' circuit may be chafed or melted against a power source, causing the engine computer to read a constant high voltage.
If the sensor loses its ground connection, the signal circuit voltage can float high, triggering this code.
Corroded, pushed-out, or loose terminals in the pedal sensor connector can alter the circuit resistance and cause a false high voltage signal.
An internal failure within the engine computer's reference circuit or pull-down resistor is possible but extremely rare.
It is not recommended. The vehicle will likely be in limp mode, severely limiting speed and acceleration, which is dangerous in traffic. The underlying issue could also cause unpredictable throttle behavior.
No. This code specifically refers to the accelerator pedal position sensor circuit, not the throttle body. The pedal sensor sends the input, while the throttle body acts on it.
Rarely. Drivers and mechanics are frequently told to replace the PCM for this code, but that is almost always incorrect. The cause is overwhelmingly a failed pedal position sensor or a wiring/connector issue. The PCM should only be considered after all sensor and wiring possibilities have been thoroughly eliminated.
It means the voltage on the specific signal wire is higher than the normal operating range expected by the engine computer. This commonly happens when a wire shorts to power or when the sensor loses its ground connection.