P2120 - OBD Trouble Code

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Wondering on how to crack the error code P2120? Don’t know what to do? Well, Parts Avatar has a solution. This OBD-II code P2120 is referred to as a throttle/pedal position sensor/switch "D" circuit. The role of monitoring the opening of the throttle valve is played by the electronic throttle control system. It can be seen that at the time when the accelerator pedal is pressed by the driver, the accelerator pedal position sensor (APP) transfers a signal to the engine's control module (PCM). This signal informs the PCM about how much power the driver is requesting from the engine. The PCM then orders the throttle plate to open accordingly. The code P2120 is stored by the PCM, when it detects that the APP sensor is not changing properly (whenever the accelerator is depressed or released). At times, the engine may be into "limp home mode" by the PCM. This also restricts the power available from the engine to avoid any unwanted acceleration.

It should be noted that this code P2120, is a generic code for the engine control module (ECM) identifying a major malfunction in the throttle pedal position sensor circuit of below or above the specified voltage return from the sensor.

What causes this problem with the Throttle Position Sensor/Switch C Circuit Malfunction?

• A clinging throttle return spring
• A possible corrosion in the TPS or MAP connector
• A deviated harness leading to friction
• A malfunctioning TPS
• A defective powertrain control module

1. Throttle Position Sensor - Are you experiencing sudden speed surges? Check engine light intermittently flashing? Unexplained jerking? Well, all this happens due to a faulty throttle position sensor. Get your changed now with Parts Avatar. Log in now!
2. Switch Circuit - Car stalling? Malfunctioning accessories? Dead battery? Don’t know the reason behind? All this happens due to a bad switch circuit. Replace or repair now in order to get you error code P2120 fixed. Tune in now!
3. Intake Manifold Tuning Valve - A defective intake manifold tuning valve accompanies problems like engine glitches, decrease in power and a poor fuel economy. Worried? Not anymore! Parts Avatar, your one stop destination has a solution for all your problems. Tune into Parts Avatar if you want to get rid of all these problems and the error code P2120.
4. Powertrain Control Module - See the error code P2120 popping again and again? A faulty powertrain control module is likely to invite issues like a poorly running engine, increase in carbon emission, choking, stuttering and stalling of the engine. Well, to avoid these, we recommend a replacement or repair of the powertrain control module before it worsens the condition of the system.
5. Brake Pedal Position Sensor - The brake pedal position sensor’ chief task is to monitor the hydraulics of the vehicle and switch on the brake lights as the pedal is depressed. So a faulty one can really be problematic triggering a whole lot of problems. Tune into Parts Avatar now!
6. Engine Control Module - A sluggish engine crank, engine stall, check engine light illuminated? Don’t know what to do? Tired of all these problems? Well, it could be due to a malfunctioning engine control module. Tune into Parts Avatar for your brand new ECM offered at best prices.

Willing to know some common symptoms of OBD code P2120? Your wish is our demand. Have a look at them below:

Common Symptoms

• An illuminated check engine light. Also, the code is stored in ECM memory as an error
• Limited acceleration, sluggish throttle response and a limited RPM in the engine is likely to be experienced
• In accordance with the failure mode, the manufacturer might rely on various other symptoms observed like idle, restricted power and throttle opening

We have listed out some ways which would help you to correct the occurrence of OBD code P2120. They are mentioned here as follows:

• Replacements or repairs should be performed of the throttle position sensor
• Any loose or short circuit in the return wiring of the sensor or connector should be mended
• All the connectors associated with the TPS or MAP sensor that are corroded or loose should be changed or repaired
• A disconnected throttle return spring should be changed or repaired as soon as possible
• Amendments should be made in order to fix a malfunctioning powertrain control module
• A damaged throttle position sensor should be changed or replaced

There is no need to get strained if your OBD code is still flashing up as we are here at your service. Have a look at our superior variety of position sensor, switch circuit, tuning valve, PCM, pedal position, ECM, fuel injectors, fuel injector harness, body control module and many more. Now all your problems would vanish within no time.

If you want to easily diagnose this P2120 fault code, then all you have to do is to follow the steps which are mentioned below:

• Firstly, the code should be scanned in the ECM to check for all the freeze frame data for failure
• As per the manufacturer’ pinpoint test, the diagnosis of the code should be performed
• All the data scanned from the throttle position sensor should be checked in order to ensure the presence of a proper reference voltage and a right throttle angle

Common Mistakes When Diagnosing the P2120 Code

Here we have listed for your convenience a few common mistakes that should be avoided while diagnosing the error code P2120:

• In order to avoid duplication, the memory codes should be cleared from the ECM even before checking the freeze frame data for the main failure
• A failure in clearing the codes (after they have been mended)