While several diagnostic issue codes can lead to disaster, the P0122 code is one of the least expensive and dangerous. Take a deep breath and relax if you utilize your trusty OBD-II scanner to learn that code P0122 is the cause of your check engine light. It’s not a big deal, and it’s simple to solve. But what precisely is the P0122 error code, and how can you fix it?
Continue reading to learn everything you need to know.
What is the Significance of Code P0122?
Your engine’s computer uses the pedal position sensor/switch data and the throttle position sensor/switch to enhance engine performance and fuel efficiency. A P0122 code is generated when the computer gets an abnormally low input from sensors or switches. The system then switches to preset air-to-fuel ratios and sparkplug timing outputs.
What are the Symptoms of Code P0122?
If you have a code P0122, you may not notice anything other than a check engine light. However, when the problem worsens, you may notice several errors. The longer you wait to fix the code, the worse the situation will become. While there are usually no symptoms, you will most likely have higher emissions, and a code P0122 can result in you failing an emissions test.
Also, certain cars may have difficulty starting, while others may have a diminished response when attempting to accelerate. The longer the code stays, the more probable these issues will arise:
- The engine may be hard to start
- Decreased responsiveness during acceleration
- Often, no noticeable symptoms
What causes Code P0122?
When you have the P0122, you can usually reduce the problem to one of three possibilities. First, a bad throttle position sensor/switch or a faulty pedal position sensor/switch could be the problem. The code indicates an issue with the reading from the sensor or switch, which is frequently the case.
Second, trash or damaged floor mats might clog and obstruct the pedal position sensor, resulting in the P0122 code. Finally, it doesn’t matter whether all of the sensors and switches are operational if the wiring that transmits and powers them is rusted or damaged. Electrical troubles can cause engine abnormalities if a wire shorts out or crosses another circuit. These are the most prevalent problems that originate from code P0122.
If you’re not an electrical wizard, it might be advisable to take it to the shop dealing with such issues:
- Defective throttle position sensor or switch
- Defective pedal position sensor or switch
- Debris is interfering with the pedal position sensor
- Faulty or corroded wiring or sensor
TL;DR
First, a poorly installed throttle position sensor could result in erroneous data and shoddy connections. Second, the circuit connecting the sensor to the ground or another wire may be shorting out.
How serious is code P0122?
One of the less serious codes that your engine could have is P0122. While you don’t want to put off repairs permanently, it’s completely OK to wait a few weeks until you can get it to the shop or while you wait for a part to arrive.
The major issues you may notice are:
- An increase in pollutants.
- A little increase in fuel consumption.
- A slightly reduced throttle response.
However, a check engine light is frequently the only sign unless the condition worsens.
Cost of fixing the P0122 code
P0122 might be caused by a faulty TPS, damaged wiring, or improper TPS installation. It is impossible to give an accurate estimate without first examining the situation. If you bring your car in for a diagnosis, most shops will start with a one-hour “diag time” (time spent in labor diagnosing your specific issue).
Depending on the shop’s labor rate, this can cost anywhere from $75 to $150. If you have the shop handle the repairs, the diagnosis fee will be applied to the necessary repairs. Following that, a company will be able to give you an accurate repair quote for your P0122 code.
How to fix the P0122 code
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.
However, before you order a new sensor, double-check a few things. First, make sure the pedal position sensor is clear of any impediments. Minor particles or tears frequently hamper the pedal position sensor in the floor mats.
After that, double-check that the sensor receives and delivers power signals properly. While this may be a difficult procedure, it’s quite simple if you have a multimeter. Next, remove the sensor and check for input power. You’ll need to start the engine to do this, but both sensors are in places where you should be able to do so safely.
Check the wire for corrosion and resistance if everything is getting electricity. If everything is in order, the sensor is the issue. If not, you’ll need to do more troubleshooting to figure out what’s wrong. A loss of power is frequently caused by a blown fuse, a 10-cent remedy for your check engine light. If you have a wiring problem, however, pinpointing the specific location of the problem can be difficult.
However, the wiring harness is usually pricey. Fortunately, wiring problems are uncommon. These issues usually occur after you haven’t driven your vehicle in a while, and rodents or other small animals have created a home in the engine bay.
Commonly Asked Questions
Code P0122 indicates that the Throttle Pedal Position Sensor/Switch (TPS) A Circuit has a low input. The PCM logs this code when the voltage output from TPS Sensor Circuit A goes below the sensor’s expected range.
P0122 code Ford indicates “Throttle Position Sensor/Switch A Circuit Low Input.” The PCM logs this code when the throttle position sensor “A” exhibits a lower-than-normal voltage.
Chevy code P0122 indicates “Throttle Position Sensor/Switch A Circuit Low Input.” The PCM logs this error code when the throttle position sensor “A” displays a lesser voltage than normal.
Code P0122 Ford F150 implies that the PCM identified a lower input in the throttle position sensor (TPS)/switch A circuit. The TPS tracks the throttle’s position.
P0122 code Chevy implies a problem with the throttle position sensor. (TPS). It indicates that the TPS “A” has a lower voltage than usual. This PCM logs this code when the voltage falls below the sensor’s set range.
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