P0122 Chrysler 2.4L – Test a Sebring TPS Sensor

The P0122 Chrysler OBDII trouble code has to do with the throttle position sensor in your 2.4 liter Chrysler engine. The TPS is responsible for informing your ECU where the throttle blade sits and what percentage it has opened. Using this reference along with data collected from other sensors in your 2.4 liter Chrysler engine, your Sebring ECU delivers the right amount of fuel and controls ignition spark to operate your engine.

Acting like a potentiometer the TPS sensor in your Chrysler is mounted on the opposite side of your throttle blade. Depending on your year, this guide will help you test a Sebring TPS sensor to resolve your P0122 Chrysler trouble code. The specific language for this OBDII check engine code is Throttle Position Sensor Switch A Circuit Low Input. This means that for whatever reason, your Sebring is transmitting a signal that your ECU recognizes as lower than what it’s expecting.

Typically this signal ranges from a 0-5 volt range and the P0122 Chrysler trouble code means that the signal received is actually lower than your throttle blade being closed. As you might imagine this causes an issue with driveability since your engine computer cannot properly read your throttle body and how far open or closed it really is.


Today I’ll be showing you how to fix the P0122 Chrysler trouble code in a 2002 Chrysler Sebring 2.4 liter, by testing the TPS sensor using a multimeter. The throttle position sensor on your 2.4 liter engine is a three pin unit, and we’ll be testing the signal being sent to your ECU with a multimeter. You can use another one of our OBDII guides on checkenginetroublecode.com to troubleshoot your TPS sensor if it’s failed completely.

Because this P0122 code refers to the throttle signal being too low, we will be backpinning the connector at the Chrysler Sebring TPS signal wire in question. Refer to the image below to see the signal wire for your Sebring TPS.


The part number for this Chrysler throttle sensor is 5S5088 and can also be found under EC3306, 71-7584, 4606397AA or even 2-29916 and TH295 part numbres as well. If you need to replace your Sebring TPS, you may want to replace the entire throttle body to avoid having to calibrate your throttle position sensor. Simply installing a new sensor will not resolve your problem, if you are not sure on how to calibrate your TPS.

If you think your Sebring TPS sensor is failing, you may experience some drivability issues before the P0122 trouble code is triggered. Some of these Sebring driving problems could include but is not limited to;

  • Lurching or Bucking
  • Inconsistent throttle response
  • Poor gas mileage
  • Uncontrollable throttle

Common causes of the P0122 Check Engine Light

  • Voltage problem
  • Wiring issue
  • TPS out of calibration
  • TPS sensor failing

Because the nature of this test relates to the signal being sent from the throttle sensor, we are measuring only the middle wire of your TPS. Locate a paper clip and straighten it to build yourself a quick and handy backpin. Insert said pin to the back of your 3 wire TPS connector from your Sebring, and when you are ready insert the key and turn to the “ON” position.

How To Test a Sebring TPS Sensor


You are going to be using the backpin you’ve just inserted into your TPS connector, and using your multimeter to read the real time values as they are being transmitted to your ECU. Measure the TPS backpin or the middle wire for voltage with the key turned to the “ON” position but engine turned off. When your throttle blade is completely closed, you should see roughly .45 worth of voltage at this pin.

If your P0122 Chrysler OBDII trouble code is not intermittent, chances are you will have no voltage at this wire whatsoever. Not to worry at this point in time however. Now locate the throttle body butterfly, or the mechanism that your throttle cable is connected to. While reading the value from the middle pin, gently depress the butterfly to open your throttle body. Remember that your Sebring engine should be turned off at this time.

With your Sebring throttle position sensor opened fully, or wide open throttle (WOT) the voltage at the middle pin should be 4.5 volts. This represents a full open throttle to your PCM, now you will be slowly closing the throttle body and monitoring your voltage. You should see an even and uniform decrease and increase in voltage as you operate the throttle position sensor.

Make sure to check for any jumps or dips in voltage as you slowly open the throttle blade and close it. If your voltage is under 4.5 at wide open throttle, or failing to register any voltage at a closed position your TPS sensor may be out of whack and in need of an adjustment.

Once you replaced your throttle position sensor, you can use a scan tool to clear your P0122 Chrysler now that you know how to test a Sebring TPS Sensor. Have any questions about this guide? Leave me a message below and let me know!

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