Code P0122 may also indicate that you may have loose or poor connectivity to the throttle position sensor itself or potentially not enough voltage being supplied from the ECM. I would recommend having an expert from YourMechanic come to your location to diagnose and repair your throttle position sensor voltage issue.
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Do you have to reset computer after replacing throttle position sensor? After replacing the throttle position sensor in your engine, if the engine light was on and has a pending code, the code should go away. If the code doesn`t, however, then the ECM (engine computer module) will need resetting.
Potential Causes
First, the throttle position sensor might not be mounted correctly, causing inaccurate readings and poor connections. Second, the sensor might be experiencing a short in the circuit connecting the unit to the ground wire or another wire.
Reprogramming or resetting your sensor can sometimes solve these issues. This step can also be necessary when you install a new sensor. The easiest way to reset your throttle position sensor is to unhook the negative cable from your battery for up to five minutes or to remove the fuse for your engine control module.
With the vehicle off, turn the key to the “On” position, but do not start the car. Hold the TPMS reset button until the tire pressure light blinks three times, then release it. Start the car and wait about 20 minutes for the sensor to refresh.
Step 1: After you finish cleaning your throttle body, start the car and let it idle for four minutes. The RPMs might be high at first but should gradually settle down as the ECU absorbs the data. Step 2: Turn off the car for 90 seconds. Then, turn it back on and allow it to idle for another four minutes.
To fix code P0122, you usually need to order a new throttle or pedal position sensor. However, both components are inexpensive and simple to change, making this a simple code to repair.
If your car encounters the P0122 code, it may experience a significant decrease in performance and speed, and you may have difficulties driving and accelerating as throttle response may become limited. Also, when turned on and stationary, your vehicle may idle much higher than usual.
Once you have fitted a Throttle Position Sensor, or TPS, you will need to calibrate it from within MEITE. First, be sure you have correctly wired, and assigned the throttle sensor signal input to “TPS Raw” in the Analog Settings.
It will eventually learn on its own, but it may take several days to a week of driving. In this time, the engine may experience high and low idle speeds, and possibly rough idle. The following is an example of a throttle body relearn procedure from GM: Start the engine and let it idle for three minutes in park.
Make sure that the accelerator pedal is fully released. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds. Turn ignition switch “ON” and wait at least 2 seconds.
In fact, on some engines a new throttle body needs to be programmed with a factory, or equivalent, scan tool. The technician cannot even clean the carbon out of the throttle body in some cases without setting a “check engine” light.
Increase Throttle Response with Aftermarket Throttle Bodies
More air volume and speed is a surefire way to increase horsepower and throttle response at any given RPM. It is easy to achieve this at high RPM when the engine sucks in substantial amounts of air on its own. But coming off idle is another story.
Once you have fitted a Throttle Position Sensor, or TPS, you will need to calibrate it from within MEITE. First, be sure you have correctly wired, and assigned the throttle sensor signal input to “TPS Raw” in the Analog Settings.
ECU reset is not manadatory when replacing the air filter. The only thing is that it clears the previous values got from the MAF sensor. Even if you don`t rest it, it will learn those new values.
The throttle position sensor (TPS) is often located on this body, however, and can be damaged when an untrained person attempts to clean it, resulting in a necessary recalibration after the fact–which can also be inconvenient and requires a trip to the mechanic or dealership.
Cleaning the throttle body allowed more air to enter the engine, and the computer is compensating by adding more fuel. The idle will relearn if you put the vehicle in drive and allow the idle to come down with all accessories off for about two to three minutes.