P0401 on Ram vehicles Not enough exhaust gas is being recirculated
P0401 is named on 6 Ram model years (2016–2021): 10 manufacturer filings and 0 owner reports in NHTSA’s files, across 2500, 3500.
Which Ram model years name P0401
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2016 Ram 2500 | Air Bags | 3 | — |
| 2016 Ram 3500 | Electrical System | 3 | — |
| 2021 Ram 2500 | Power Train | 1 | — |
| 2021 Ram 3500 | Power Train | 1 | — |
| 2017 Ram 2500 | Engine | 1 | — |
| 2017 Ram 3500 | Engine | 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.
Ram filings that name P0401
Source: NHTSA manufacturer communicationsBulletins and campaigns Ram filed with NHTSA whose summary names P0401. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 9003758 Service bulletin2017-07-19 · Air Bags
- EGR Cooler If a customer comes in with a check engine light for P0401, P2281 or P0234 and the,technician has determined the EGR Cooler is plugged with soot, please contact Stephen Alvarado at the STAR Center at (866) 799-1695 ext. (4720271). Cummins Engineering is currently investigating root cause of this condition. If you do not receive an answer or call back within 15 minutes, proceed with nor
- 1813022 Service bulletin2022-07-09 · Power Train
- Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs. P0401 - EGR System Performance. P2281 - Air Leak Bet
- 1813022 Service bulletin2022-07-09 · Electrical System
- Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs. P0401 - EGR System Performance. P2281 - Air Leak Bet
- 18-093-22 Service bulletin2022-05-10 · Power Train
- Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain ControlModule (ECM/PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or moreof the following DTCs have been set: P0299 - Turbocharger Underboost. P0401
What P0401 means
Source: SAE J2012 / OBD-IINot enough exhaust gas is being recirculated.
A stored code names the test that failed, never the part that caused it. The record above is what Ram and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P0401 a known problem on Ram vehicles?
It is a documented one: NHTSA's files hold 10 manufacturer filings and 0 owner reports naming P0401 on 6 Ram 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 Ram models does P0401 appear on most?
2016 2500 (3 documents), 2016 3500 (3 documents), 2021 2500 (1 document).
Does P0401 on a Ram 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.