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Federal filingsHome›Trouble codes› P04EC
Diagnostic trouble code

P04EC

0 owner reports and 28 manufacturer filings across 7 model years from Dodge, Jeep, Ram.

Powertrain Generic OBD-II code 28 manufacturer filings

Where P04EC shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reportsParts
2021 Jeep WranglerFuel/Propulsion System10—Fuel pump →
2021 Dodge ChallengerFuel/Propulsion System3—Fuel pump →
2021 Jeep GladiatorFuel/Propulsion System3—Fuel pump →
2021 Ram 1500Fuel/Propulsion System3—Fuel pump →
2021 Ram 2500Fuel/Propulsion System3—Fuel pump →
2021 Ram 3500Fuel/Propulsion System3—Fuel pump →
2021 Ram ProMasterFuel/Propulsion System3—Fuel pump →

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

Fuel/Propulsion System 23 Exterior Lighting 5
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28 manufacturer filings name P04EC. 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.

Read the filingsSearch every bulletin →
Photo: Compagnons / Unsplash

Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names P04EC.

What P04EC means

Source: SAE J2012 / OBD-II

P04EC 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.

From here
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Common questions about P04EC

Source: NHTSA files and the OBD-II standard

Can I keep driving with P04EC 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.

Where to go next

pages beside this code
Filed alongside P0455 Another code that appears in the same filings and owner reports as P04EC.Filed alongside P0456 Another code that appears in the same filings and owner reports as P04EC.Vehicle 2021 Jeep Wrangler The model year P04EC is filed against most often.The data Trouble codes by API GET /v1/dtc joins every code to bulletins and owner reports — free tier, no card.