P0340 A fault in the camshaft position sensor circuit on bank 1
8 owner reports and 216 manufacturer filings across 78 model years from Buick, Cadillac, Chevrolet, Chrysler and others.
Where P0340 shows up
Source: NHTSA manufacturer communications and complaintsShowing the 25 model years where P0340 appears most; it is on file for 78 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.
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P0340 by make
The same record, one make at a time: the model years, bulletins and owner reports that name P0340 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.
The 2021 Honda Civic experienced an emission system failure at 70,000 MPH and detected fault code p0340, possibly an injector failure
The engine codes scanned via the OBDII port directly after are as follows: P051B, P0299, P0340, P0344, P0365 and P0369
Car will either not start or heists to start code with check engine light is P0340 for camshaft position sensor I have already replaced this once before 2yrs ago it should not need to be replaced again so soon
Upon running a diagnostic, the following error codes displayed; P0420, P0340, P0197, P0117, P1D83, P2181(several codes showing up more than once showing permanent, pending)
I received a notofication for a "field service action" 20b14 for a powetrain control module update on my 2020 Ford Escape hybrid due to "stop safely now" and check engine light and dtc's P0340 and P0340 I took it in to the dealership on 23…
216 manufacturer filings name P0340. 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 P0340.
- 18-104-22 Service bulletin2022-05-26 · Power Train
- Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the 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 more of the following DTCs have been set: P0556 - Brake Booster Pressure Sensor Circuit Performance. P0340 - Cam Position Sensor Circ
- 1805022 Service bulletin2022-03-11 · Back Over Prevention
- Flash: Powertrain Control Module (PCM) Updates This bulletin involves updating the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, the technician may notice one or moreof the following Diagnostic Trouble Codes (DTCs) have been set: P0340 - Camshaft Position Sensor Circuit - Bank 1 Sensor A. P0345 - Cam
- 1805022 Service bulletin2022-03-11 · Electrical System
- Flash: Powertrain Control Module (PCM) Updates This bulletin involves updating the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, the technician may notice one or moreof the following Diagnostic Trouble Codes (DTCs) have been set: P0340 - Camshaft Position Sensor Circuit - Bank 1 Sensor A. P0345 - Cam
- 1805022 Service bulletin2022-03-11 · Power Train — Automatic Transmission — Control Module (Tcm/Pcm/Tecm)
- Flash: Powertrain Control Module (PCM) Updates This bulletin involves updating the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, the technician may notice one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P0340 - Camshaft Position Sensor Circuit - Bank 1 Sensor A. P0345 - Ca
- SSM 50245 Service bulletin2021-10-29 · Electrical System
- Some 2020-2021 Escape vehicles may exhibit various symptoms due to a loss of voltage reference (VREF) from the 14290 harness above the steering shaft u-joint. Possible symptoms may include an illuminated malfunction indicator lamp (MIL),runs rough, fuse 44 open and may or may not set DTCs P06A7, P0840, P0842, P0845, P0847, P2122, P2127, P0522, P008A, P06A6, P2196, P0192, P0369, P0212, P0340, P0344
- SSM 50116 Service bulletin2021-09-14 · Steering
- Some 2020-2021 Escape vehicles may exhibit a loss of voltage reference (VREF) or runs rough, blow fuse 44 and may or may not set DTC's P06A7,P0840,P0842,P0845,P0847,P2122,P2127,P0522,P008A,P06A6,P2196,P0192, P0212,P0340,P0344,P0365,P0532,P06E9,P0369,C175E,C175B,C2302,P0369. The 14290 harness directly above the steering shaft u-joint near the upper brake pedal mount may come in contact with the ste
What P0340 means
Source: SAE J2012 / OBD-IIA fault in the camshaft position sensor circuit on bank 1.
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 P0340
Source: NHTSA files and the OBD-II standardCan I keep driving with P0340 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.