⌘K
Find a vehicleRecallsCompareNewsPricing
Look one up
VIN decoderTrouble codesProblems by systemService bulletinsInvestigations
Browse the record
GuidesRankingsAll makesDriver-assist crashesWhat is in the dataWarranty extensions
Tools & data
Recall WatchFleet VIN checkRecall disclosure formCar crosswordCost calculatorsTitle brandsAPI & data
Account
Sign inGarage
Home›Trouble codes›P0420› Dodge
Diagnostic trouble code · Dodge

P0420 on Dodge vehicles The catalytic converter on bank 1 is not cleaning up the exhaust as well as it should

P0420 is named on 9 Dodge model years (2016–2019): 7 manufacturer filings and 5 owner reports in NHTSA’s files, across Challenger, Durango, Journey, Charger, Grand Caravan.

Powertrain 9 model years 7 manufacturer filings 5 owner reports

Which Dodge model years name P0420

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2019 Dodge ChallengerElectrical System2—
2019 Dodge DurangoElectrical System2—
2017 Dodge JourneyElectrical System—2
2019 Dodge ChargerEquipment1—
2019 Dodge JourneyEngine1—
2018 Dodge DurangoPower Train1—
2018 Dodge JourneyElectrical System—1
2017 Dodge Grand CaravanFuel/Propulsion System—1
2016 Dodge JourneyEngine—1

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.

Electrical System 5 Power Train 2 Engine 2 Unspecified 1
Advertisement

Dodge filings that name P0420

Source: NHTSA manufacturer communications

Bulletins and campaigns Dodge filed with NHTSA whose summary names P0420. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What P0420 means

Source: SAE J2012 / OBD-II

The catalytic converter on bank 1 is not cleaning up the exhaust as well as it should.

A stored code names the test that failed, never the part that caused it. The record above is what Dodge 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 P0420 a known problem on Dodge vehicles?

It is a documented one: NHTSA's files hold 7 manufacturer filings and 5 owner reports naming P0420 on 9 Dodge model years (2016–2019). 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 Dodge models does P0420 appear on most?

2019 Challenger (2 documents), 2019 Durango (2 documents), 2017 Journey (2 documents).

Does P0420 on a Dodge 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 P0430 Another code that appears in the same filings and owner reports as P0420.Filed alongside P0087 Another code that appears in the same filings and owner reports as P0420.Vehicle 2019 Dodge Challenger The model year P0420 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.