P0308 Cylinder 8 is misfiring
5 owner reports and 1,485 manufacturer filings across 268 model years from Buick, Cadillac, Chevrolet, Ford and others.
Where P0308 shows up
Source: NHTSA manufacturer communications and complaintsShowing the 25 model years where P0308 appears most; it is on file for 268 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.
P0308 by make
The same record, one make at a time: the model years, bulletins and owner reports that name P0308 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.
On March 26th, 2026 while driving on the parkway at about 60 mph, my vehicle experienced loss of power (slow deceleration, shaking/hesitation) and I immediately took it to the repair shop where it was diagnosed as a P0308 code (misfire on…
The vehicle is currently experiencing a cylinder 8 misfire (code P0308), accompanied by engine backfiring, ticking noise, and exhaust fumes inside the cabin
I brought in vehicle for check engine light is on for p0300 / p0308 had misfire tech removed engine valve cover and determine no movement in valve train components tech determine valve train failure lifters possible camshaft we would need…
1,485 manufacturer filings name P0308. 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 P0308.
- TSB 26-2011 Service bulletin2026-01-22 · Power Train
- Some of the vehicles listed in the Model statement above may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0300, P0316, and/or P0301 through P0308. This may be due to the software in the powertrain control module (PCM).
- SSM 53215 Service bulletin2024-12-10 · Unknown Or Other
- Some 2024 Mustang Dark Horse™ vehicles equipped with a manual transmission may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0300, P0302 and P0308 stored in the powertrain control module (PCM) from extended high speed or racetrack operation (driving the vehicle and allowing the engine to hit maximum engine speed, several times and in a short period).
- SSM 52926 Service bulletin2024-09-20 · Unknown Or Other
- Some 2024 Mustang Dark Horse™ vehicles equipped with a manual transmission may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0300, P0302 and P0308 stored in the powertrain control module (PCM) from extended high speed or racetrack operation (driving the vehicle and allowing the engine to hit maximum engine speed, several times and in a short period).
- PIP5628F Service bulletin2023-04-24 · Engine And Engine Cooling — Engine — Engine Control Module (Ecu/Ecm)
- This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
- 23-NA-043 Service bulletin2023-04-19 · Engine And Engine Cooling
- This service bulletin provides a procedure to replace the valve lifter and guides to correct customer concerns of Poor Engine Performance, Engine Misfires, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 Set.
- PIP5628E Service bulletin2023-02-10 · Equipment — Electrical — Accessory Generator — Outlets/Receptacle
- This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
What P0308 means
Source: SAE J2012 / OBD-IICylinder 8 is misfiring.
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 P0308
Source: NHTSA files and the OBD-II standardCan I keep driving with P0308 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.