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Home›Trouble codes›P0455› Jeep
Diagnostic trouble code · Jeep

P0455 on Jeep vehicles A large leak in the evaporative emissions system — often a fuel cap left off

P0455 is named on 8 Jeep model years (2016–2021): 16 manufacturer filings and 1 owner report in NHTSA’s files, across Wrangler, Gladiator, Grand Cherokee, Gladiator Pickup, Renegade.

Powertrain 8 model years 16 manufacturer filings 1 owner report

Which Jeep model years name P0455

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2021 Jeep WranglerFuel/Propulsion System5—
2021 Jeep GladiatorFuel/Propulsion System3—
2020 Jeep WranglerFuel/Propulsion System3—
2016 Jeep Grand CherokeePower Train2—
2020 Jeep Gladiator PickupElectrical System1—
2020 Jeep Grand CherokeeElectrical System1—
2017 Jeep RenegadeEngine—1
2016 Jeep WranglerEngine1—

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Fuel/Propulsion System 9 Electrical System 4 Engine 2 Exterior Lighting 1
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What Jeep owners said

Source: NHTSA complaint database

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

On July 25, another diagnostic showed Check Engine FAIL with codes P0172, P0455 and P0456
2017 Jeep Renegade Aug 11, 2026 NHTSA owner report

Jeep filings that name P0455

Source: NHTSA manufacturer communications

Bulletins and campaigns Jeep filed with NHTSA whose summary names P0455. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What P0455 means

Source: SAE J2012 / OBD-II

A large leak in the evaporative emissions system — often a fuel cap left off.

A stored code names the test that failed, never the part that caused it. The record above is what Jeep and its owners have filed about it; the code’s page across every make has the whole file.

From here
Get a model's new bulletins by email See what owners reported Look up a bulletin by its number Watch a VIN for new recalls

Common questions

Source: NHTSA files and the OBD-II standard

Is P0455 a known problem on Jeep vehicles?

It is a documented one: NHTSA's files hold 16 manufacturer filings and 1 owner report naming P0455 on 8 Jeep model years (2016–2021). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.

Which Jeep models does P0455 appear on most?

2021 Wrangler (5 documents), 2021 Gladiator (3 documents), 2020 Wrangler (3 documents).

Does P0455 on a Jeep mean it is recalled?

No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.

Where to go next

pages beside this code
Filed alongside P0442 Another code that appears in the same filings and owner reports as P0455.Filed alongside B3055 Another code that appears in the same filings and owner reports as P0455.Vehicle 2021 Jeep Wrangler The model year P0455 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.