P0402 Too much exhaust gas is being recirculated
3 owner reports and 96 manufacturer filings across 21 model years from Chevrolet, Ford, GMC, Jeep and others.
Where P0402 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2024 Chevrolet Silverado 2500HD | Electrical System | 15 | — | EGR valve → |
| 2024 GMC Sierra 2500HD | Electrical System | 15 | — | EGR valve → |
| 2024 Chevrolet Silverado 3500HD | Electrical System | 12 | — | EGR valve → |
| 2024 GMC Sierra 3500HD | Engine | 12 | — | EGR valve → |
| 2017 Ford F-250 Super Duty | Engine | 5 | — | EGR valve → |
| 2017 Ford F-350 Super Duty | Engine | 5 | — | EGR valve → |
| 2017 Ford F-450 Super Duty | Engine | 5 | — | EGR valve → |
| 2019 Ford F-250 Super Duty | Power Train | 3 | — | EGR valve → |
| 2018 Ford F-250 Super Duty | Engine | 3 | — | EGR valve → |
| 2019 Ford F-350 Super Duty | Power Train | 3 | — | EGR valve → |
| 2018 Ford F-350 Super Duty | Engine | 3 | — | EGR valve → |
| 2019 Ford F-450 Super Duty | Power Train | 3 | — | EGR valve → |
| 2018 Ford F-450 Super Duty | Power Train | 3 | — | EGR valve → |
| 2022 Ford Maverick | Power Train | 2 | — | EGR valve → |
| 2017 Ram 1500 | Engine | — | 2 | EGR valve → |
| 2016 Ram 2500 | Electrical System | 2 | — | EGR valve → |
| 2016 Ram 3500 | Power Train | 2 | — | EGR valve → |
| 2016 Jeep Grand Cherokee | Engine | — | 1 | EGR valve → |
| 2025 Mazda CX-30 | Engine | 1 | — | EGR valve → |
| 2025 Mazda CX-5 | Engine | 1 | — | EGR valve → |
| 2025 Mazda Mazda3 | Engine | 1 | — | EGR valve → |
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.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
P0402 by make
The same record, one make at a time: the model years, bulletins and owner reports that name P0402 on that maker’s vehicles.
What it gets filed under
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
Truck was consuming coolant and you could smell it but can't see a leak then the service electronic throttle control light came on a few weeks later with a code reading P0402
96 manufacturer filings name P0402. 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.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P0402.
- SA-060-26 Service bulletin2026-10-01 · Engine
- NOTE: This service information only applies to vehicles with PYUKD engine and EGR. DESCRIPTION DTC P0402 EGR malfunctions may be falsely detected due to an internal malfunction of the MAP sensor. REPAIR PROCEDURE 1. Using MDARS, verify DTC P0402 is set in current or past history.
- 23-NA-066 Service bulletin2023-07-27 · Engine And Engine Cooling
- This technical bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with DTC P0402 Set.
- 23-NA-066 Service bulletin2023-06-09 · Engine And Engine Cooling
- This technical bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with DTC P0402 Set.
- PIP5916B Service bulletin2023-05-31 · Engine And Engine Cooling — Engine — Engine Control Module (Ecu/Ecm) — Software
- This Preliminary information communicates that there is a software issue in the ecm for the following dtc's P062D P163A P163B, P0402 P144E. P2635 which could cause a crank, no start issue, and how to correct.
- PIP5916A Service bulletin2023-05-30 · Engine And Engine Cooling — Engine — Engine Control Module (Ecu/Ecm) — Software
- This Preliminary information communicates that there is a software issue in the ecm for the following dtc's P062D P163A P163B, P0402 P144E. P2635 which could cause a crank, no start issue, and how to correct.
- 23-NA-066 Service bulletin2023-04-11 · Engine And Engine Cooling
- This technical bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with DTC P0402 Set.
What P0402 means
Source: SAE J2012 / OBD-IIToo much exhaust gas is being recirculated.
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 P0402
Source: NHTSA files and the OBD-II standardCan I keep driving with P0402 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.