P0122 Code (Symptoms, Causes, and How to Fix)

While there are plenty of diagnostic trouble codes that spell disaster, a P0122 code is one the smallest amount expensive or damaging DTCs you’ll encounter. So, if you employ your trusty OBD2 scanner to get code P0122 is that the reason for your check engine light, you’ll take a deep breath and relax. It’s not that serious, and it’s pretty easy to repair .

But what exactly is trouble code P0122, and the way are you able to repair it? Keep reading, and we’ll breakdown everything you would like to understand .

Your engine’s computer uses inputs from both the pedal position sensor/switch and therefore the throttle position sensor/switch to optimize engine performance and fuel efficiency.

When the pc receives an abnormally low input from either of those sensors or switches, it throws a P0122 code. From there, it switches to predetermined air to fuel ratios and sparkplug timing outputs.

Symptoms of Code P0122

Often you won’t notice one thing besides a check engine light if you’ve got a code P0122. However, because the problem progresses, you would possibly notice several issues cropping up, and therefore the longer you’re taking to repair the code, the more severe things can become.

While there are often no noticeable symptoms, you’re likely to possess increased emissions, and a code P0122 can cause you to fail an emissions test.

Furthermore, some vehicles may need a tough time getting started, et al. might suffer from decreased responsiveness once you attempt to accelerate. The longer the code persists, the more likely

  • it’s for these problems to happen .
  • The engine could also be hard to start out
  • Decreased responsiveness during acceleration

Causes of Code P0122

When you have a code P0122, you’ll often narrow down the matter to at least one of three things.

First, you would possibly have a faulty throttle position sensor/switch or a faulty pedal position sensor/switch. The code tells you that there’s a drag with the reading come from the sensor or switch, and sometimes the matter is simply that.

Second, debris or torn up floor mats often block and clog the pedal position sensor, which could cause your code P0122.

Finally, it doesn’t matter if all the sensors and switches are working correctly if the wiring transmitting their signals and powering them are corroded or damaged.

While these are the foremost common problems that stem from a code P0122, electrical issues can cause all kinds of engine misfits if a wire shorts out or crosses to a different circuit.

If you’re handling an electrical gremlin, it’d be best to require it to the shop if you’re not an electrical troubleshooting wizard.

  • 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

Is Code P0122 Serious?

A code P0122 is one among the less serious codes your engine could have. While you don’t want to place repairs off indefinitely, if you’ve got to travel a couple of weeks before you’ll catch on to the shop or while you’re waiting on a neighborhood to arrive, that’s perfectly fine.

The most significant concerns you would possibly notice are a rise in emissions, a touch excessive fuel consumption, and a rather decreased throttle response. However, often the sole symptom may be a check engine light until the matter worsens.

How to Fix

More often than not, all you would like to try to to to repair a code P0122 is to order a replacement throttle position sensor or a replacement pedal position sensor. Both components are relatively cheap and straightforward to exchange , making this a hassle-free code to repair .


However, before you begin ordering a replacement sensor, verify a couple of things first. Start by checking that the pedal position sensor is free from any obstructions. Often, small debris or tears within the floor mats will hinder the pedal position sensor’s correct operation.

From there, double-check that the sensor is getting and transmitting power signals the way that it should. While which may sound sort of a complicated process, if you’ve got a multimeter, it’s pretty simple .

Begin by removing the sensor and checking for input power – you’ll got to have the engine running to try to to this, but both sensors are in locations where you ought to be ready to do that safely.

If everything is getting power, check for corrosion and resistance within the wiring. If everything checks out, then the sensor is that the problem.

If not, you’ll got to troubleshoot further to diagnose the difficulty . a scarcity of power is usually a fuse issue, which may be a 10-cent fix to your check engine light.

However, if you’ve got a wiring issue, it are often challenging to pinpoint the problem’s exact location. But, if you’re looking to skip the troubleshooting, the wiring harness itself is typically expensive.

Fortunately, wiring issues are rare. Typically these sorts of problems happen once you haven’t run your vehicle for a short time , and rodents or other small animals made a home out of your vehicle’s engine bay.
Often no noticeable symptoms

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