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Diagnostic trouble code

P2172

3 owner reports and 13 manufacturer filings across 13 model years from Alfa Romeo, Dodge, Jeep.

PowertrainGeneric OBD-II code13 manufacturer filings3 owner reports

Where P2172 shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2020 Jeep WranglerElectrical System4—
2017 Alfa Romeo GiuliaPower Train1—
2020 Dodge ChallengerElectrical System1—
2019 Dodge ChallengerElectrical System1—
2020 Dodge ChargerElectrical System1—
2019 Dodge ChargerPower Train1—
2016 Dodge DartVehicle Speed Control—1
2020 Jeep CherokeeFuel System, Other1—
2018 Jeep CherokeeEngine—1
2020 Jeep CompassPower Train1—
2018 Jeep CompassEngine—1
2020 Jeep Grand CherokeePower Train1—
2019 Jeep Grand CherokeeElectrical System1—

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.

What it gets filed under

Electrical System 6Power Train 4Engine 2Exterior Lighting 2Vehicle Speed Control 1Fuel System, Other 1
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What owners said

Source: NHTSA complaint database

Owners’ 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.

The check engine light didn't even come on after several stalls but eventually it coded with P2172 which is "throttle actuator control system - sudden high airflow detected"
2016 Dodge DartDec 4, 2018NHTSA owner report

Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names P2172. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.

What P2172 means

Source: SAE J2012 / OBD-II

P2172 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.

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 P2172

Source: NHTSA files and the OBD-II standard

Can I keep driving with P2172 stored?

Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. 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.