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Diagnostic trouble code

P2440

0 owner reports and 175 manufacturer filings across 15 model years from Lexus, Toyota, Volkswagen.

PowertrainGeneric OBD-II code175 manufacturer filings

Where P2440 shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2019 Volkswagen Golf / GTIEngine And Engine Cooling36—
2020 Volkswagen Golf / GTIEngine And Engine Cooling20—
2020 Volkswagen JettaEngine And Engine Cooling14—
2019 Volkswagen JettaEngine And Engine Cooling14—
2020 Volkswagen PassatEngine And Engine Cooling14—
2019 Volkswagen PassatEngine And Engine Cooling14—
2020 Volkswagen TiguanEngine And Engine Cooling14—
2019 Volkswagen TiguanEngine And Engine Cooling14—
2018 Volkswagen AtlasEngine And Engine Cooling9—
2019 Volkswagen AtlasEquipment8—
2018 Volkswagen JettaUnknown Or Other4—
2017 Volkswagen JettaUnknown Or Other4—
2016 Volkswagen JettaUnknown Or Other4—
2016 Lexus GXEngine And Engine Cooling3—
2016 Toyota TundraEquipment3—

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

Engine And Engine Cooling 65Unknown Or Other 41Equipment 16Exterior Lighting 12Electrical System 2Tires 2
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Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names P2440. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.

What P2440 means

Source: SAE J2012 / OBD-II

P2440 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 P2440

Source: NHTSA files and the OBD-II standard

Can I keep driving with P2440 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.