P3400
2 owner reports and 88 manufacturer filings across 32 model years from Acura, Chevrolet, Honda, Mazda.
Where P3400 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2018 Mazda CX-5 | Engine | 7 | — | |
| 2018 Mazda Mazda6 | Engine | 7 | — | |
| 2019 Mazda CX-5 | Engine | 6 | — | |
| 2019 Mazda Mazda3 | Engine | 5 | — | |
| 2017 Acura MDX | Engine | 4 | — | |
| 2017 Acura RDX | Engine | 4 | — | |
| 2017 Acura RLX | Engine | 4 | — | |
| 2017 Acura TLX | Engine | 4 | — | |
| 2017 Chevrolet Corvette | Electrical System | 4 | — | Battery → |
| 2016 Chevrolet Corvette | Electrical System | 4 | — | Battery → |
| 2017 Honda Odyssey | Engine | 4 | — | |
| 2017 Honda Pilot | Engine | 4 | — | |
| 2017 Honda Ridgeline | Electrical System | 4 | — | Battery → |
| 2017 Chevrolet Camaro | Equipment | 3 | — | |
| 2016 Chevrolet Camaro | Equipment | 3 | — | |
| 2019 Mazda Mazda6 | Engine | 3 | — | |
| 2020 Mazda CX-30 | Engine | 2 | — | |
| 2020 Mazda CX-5 | Engine | 2 | — | |
| 2020 Mazda Mazda3 | Engine | 2 | — | |
| 2020 Mazda Mazda6 | Equipment | 2 | — | |
| 2016 Honda Odyssey | Engine | — | 1 | |
| 2021 Mazda CX-3 | Engine | 1 | — | |
| 2020 Mazda CX-3 | Engine | 1 | — | |
| 2019 Mazda CX-3 | Engine | 1 | — | |
| 2018 Mazda CX-3 | Engine | 1 | — |
Showing the 25 model years where P3400 appears most; it is on file for 32 in total.
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.
P3400 by make
The same record, one make at a time: the model years, bulletins and owner reports that name P3400 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.
Took it to the dealer and the code was a p3400 code, cylinder deactivation fault
Now getting engine cod p3400 vps bank 1 within 1200 miles of the first issue
88 manufacturer filings name P3400. 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 P3400.
- BTI&01032022912 Service bulletin2022-01-03 · Equipment Adaptive/Mobility
- Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for 2017 MDXs, RDXs, RLXs & TLXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P2652 (Rocker Arm Oil Pressure Switch B [Bank 1] Stuck On) & P3400 (Valve Pause System [VPS] Stuck Off Bank 1) stored. Client may also complain of rough engine running conditions. To better understand the cause of this
- ATI&01032022907 Service bulletin2022-01-03 · Engine And Engine Cooling
- Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017 Odysseys, Pilots & Ridgelines with a customer complaint of the Malfunction Indicator Light (MIL) on with the DTC P2652 (Rocker Arm Oil Pressure Switch B [Bank 1] Stuck On) & P3400 (Valve Pause System [VPS] Stuck Off Bank 1) stored. Customer may also complain of rough engine running conditions. To better understand
- BTI&11292021903 Service bulletin2021-11-29 · Engine And Engine Cooling — Engine — Hard Parts Internal/Mechanical
- Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for 2017 MDXs, RDXs, RLXs & TLXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P2652 (Rocker Arm Oil Pressure Switch B [Bank 1] Stuck On) & P3400 (Valve Pause System [VPS] Stuck Off Bank 1) stored. Client may also complain of rough engine running conditions. To better understand the cause of this
- ATI&11292021902 Service bulletin2021-11-29 · Equipment — Mechanical
- Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017 Odysseys, Pilots & Ridgelines with a customer complaint of the Malfunction Indicator Light (MIL) on with the DTC P2652 (Rocker Arm Oil Pressure Switch B [Bank 1] Stuck On) & P3400 (Valve Pause System [VPS] Stuck Off Bank 1) stored. Customer may also complain of rough engine running conditions. To better understand
- BTI&10202021901 Service bulletin2021-10-20 · Engine And Engine Cooling
- Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for 2017 MDXs, RDXs, RLXs & TLXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P2652 (Rocker Arm Oil Pressure Switch B [Bank 1] Stuck On) & P3400 (Valve Pause System [VPS] Stuck Off Bank 1) stored. Client may also complain of rough engine running conditions. To better understand the cause of this
- ATI&10202021901 Service bulletin2021-10-20 · Electrical System
- Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017 Odysseys, Pilots & Ridgelines with a customer complaint of the Malfunction Indicator Light (MIL) on with the DTC P2652 (Rocker Arm Oil Pressure Switch B [Bank 1] Stuck On) & P3400 (Valve Pause System [VPS] Stuck Off Bank 1) stored. Customer may also complain of rough engine running conditions. To better understand
What P3400 means
Source: SAE J2012 / OBD-IIP3400 is a manufacturer-specific code: the second character is a 3, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
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 P3400
Source: NHTSA files and the OBD-II standardWhy does this page not define P3400?
Because it cannot be defined honestly. The second character of a trouble code says who owns its meaning, and a 1 or a 3 hands that to the manufacturer. Sites that print one definition for a manufacturer-specific code are showing you one automaker's meaning and hoping it is yours.
Can I keep driving with P3400 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.