Get 5% off in-app
400k+ download
Open app

How to Fix a P0122 Code – Causes, Symptoms and Cost

  • Expert Corner
  • Xavier Sabastian
  • 5 minutes

Spread the love

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 OBD2 scanner to learn 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.

fox tv GIF by Last Man Standing


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 cause you to fail an emissions test.

Symptoms of Code P0122

Furthermore, certain cars may have difficulty starting, while others may have 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 code 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 chevalier. 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 short 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 interfering with the pedal position sensor
  • Faulty or corroded wiring or sensor

ODE Willie's Funky Bunch car sean mechanic automobile GIF


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 most 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 P0122 code

Cost of fixing P0122 code

P0122 might be caused by a faulty TPS, damaged wiring, or improper TPS installation. It’s 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 an hour of “diag time” (the 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 any necessary repairs. Following that, a company will be able to give you an accurate repair quote for your P0122 code.

How to Fix P0122 code?

To fix a 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.

Confused No Idea GIF by Paramount+


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 to avoid problems. 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.

Save on car services with Way.com

Here’s more info on top-rated airport parkingthe best parking spots in your city, affordable auto insurance, easy auto refinance, and high-quality car washes near you


Related Posts


Press ESC to close