P0123 Throttle position sensor signal too high
3 owner reports and 10 manufacturer filings across 5 model years from Dodge, Jeep, Mercedes-Benz.
Where P0123 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2016 Dodge Challenger | Power Train | 5 | — | Throttle body → |
| 2016 Dodge Charger | Power Train | 5 | — | Throttle body → |
| 2019 Jeep Cherokee | Engine | — | 1 | Throttle body → |
| 2018 Jeep Compass | Electrical System | — | 1 | Throttle body → |
| 2019 Mercedes-Benz C-Class | Electrical System | — | 1 | Throttle body → |
A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
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What it gets filed under
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
Independent service center confirmed failure on 1/3/2026 with 6 stored fault codes: P2101, P0122, P0222, P0123, P0223, P2135
Then my engine light went on and i had to have it towed to the nearest mechanic and when they checked the car had 4 codes P0123 P0222 P2111 and U0420
10 manufacturer filings name P0123. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P0123.
- 18-062-17 Service bulletin2017-06-27 · Electrical System — Software
- Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming of the Powertrain Control Module (PCM) with the latest software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Codes (DTCs) have been set:U1424 - Implausible Engine Torque Signal Received. P
- 18-032-16 REV. A Service bulletin2016-08-16 · Electrical System
- Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming of the Powertrain Control Module (PCM) with the latest software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Codes (DTCs) have been set: · **U1424 - Implausible Engine Torque Signal Rec
- 18-032-16 REV. A Service bulletin2016-08-16 · Power Train — Automatic Transmission — Control Module (Tcm/Pcm/Tecm)
- Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming of the Powertrain Control Module (PCM) with the latest software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Codes (DTCs) have been set: · **U1424 - Implausible Engine Torque Signal Rec
What P0123 means
Source: SAE J2012 / OBD-IIThrottle position sensor signal too high.
A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about P0123
Source: NHTSA files and the OBD-II standardCan I keep driving with P0123 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.