Throttle Position Sensor

Tiny
LANDONM
  • MEMBER
  • 2004 MITSUBISHI LANCER
  • 2.4L
  • 4 CYL
  • 2WD
  • MANUAL
  • 177,000 MILES
So, about a month ago my TPS went bad in my car, after researching I found out that it is built into my throttle body for my year of car. So after spending $500.00 on a new throttle body, I fixed it and a few days later I went to go to work, and my car would not rev. Scanned it and it came back with the same issue plus it says my TPS Circuit High Input is bad as well. I can’t take it to a mechanic because it will not drive, and I don’t want to buy another throttle body. Just wondering if anyone is able to help with my problem.
Wednesday, June 29th, 2022 AT 10:51 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,108 POSTS
Hi,

If you are getting circuit high input, there is a chance you have a short in the wiring and the component is fine.

Could you provide me with the code you are getting so I can help pinpoint the possibilities? Also, make sure the connectors to the TB are in good condition, not corroded, and not damaged allowing a short. Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know.

Take care,

Joe
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Thursday, June 30th, 2022 AT 12:05 AM
Tiny
LANDONM
  • MEMBER
  • 5 POSTS
The codes are P0223, P0123 and P2138. Thank you for helping me out with this.
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Thursday, June 30th, 2022 AT 11:28 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,108 POSTS
Hi,

Thanks for the codes. Two are specific to the TPS (high voltage) and the P2138 is related to the accelerator pedal position sensor.

Since either of the two could cause what you experience and the TPS has been replaced, here is what I'm going to suggest. First, disconnect the connector at the TPS. Closely inspect the connection being made between the two. Check for pins pushed in, damaged, or corroded. If everything checks good, I want you to disconnect the battery and wait for about 10 minutes before reconnecting.

After reconnecting, check to see if the same symptoms are present.

Let me know. Also, I have the diagnostics for all codes listed. They are extensive. The tests for the TPS indicate either a bad sensor, faulty connection or the ECM as the most likely causes. That's why I'm suggesting the aforementioned first.

The same with the APP sensor. If this test makes no change, then we will need to jump into the diagnostics. You will need tooling that can communicate with the vehicle's modules and a multi-meter.

Let me know.

Joe
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Thursday, June 30th, 2022 AT 8:07 PM
Tiny
LANDONM
  • MEMBER
  • 5 POSTS
Thank you so much, I will let you know when I test it tomorrow.
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Thursday, June 30th, 2022 AT 9:08 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,108 POSTS
Hi,

You are very welcome. I will watch for your reply.

Take care,

Joe
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Thursday, June 30th, 2022 AT 10:39 PM
Tiny
LANDONM
  • MEMBER
  • 5 POSTS
I disconnected the battery for 10 minutes and everything is in working condition. I can't thank you enough for the help.
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Sunday, July 3rd, 2022 AT 12:12 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,108 POSTS
Hi,

You are very welcome. Sometimes they need a hard reset. LOL Regardless, thank you for the update and I'm glad to know it's fixed.

Please feel free to come back anytime in the future. You are always welcome here.

Take care and Happy 4th of July.

Joe
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Sunday, July 3rd, 2022 AT 8:31 PM

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