P0326
9 owner reports and 76 manufacturer filings across 34 model years from Buick, Cadillac, Chevrolet, GMC and others.
Where P0326 shows up
Source: NHTSA manufacturer communications and complaintsShowing the 25 model years where P0326 appears most; it is on file for 34 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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P0326 by make
The same record, one make at a time: the model years, bulletins and owner reports that name P0326 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.
Fault codes P21A1, P0019, P0326, and P219C were identified by an ASE Master Technician
Service center diagnosed P0326 ($159.00) From the service center: We have pulled code P0326 for an issue with the knock sensor readings
Once they conducted their diagnostic they found that the Engine needed to be replaced showing code P0326, P0014, P052A, P0506, P0300, P0301, P0303
The car was well maintained, and serviced regularly. Consumer stated following codes from diagnostic P0326, P0014 P0303. Consumer statedmanufacturer could not do anything about
76 manufacturer filings name P0326. 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 P0326.
- 24-NA-180 Service bulletin2025-04-05 · Engine
- This technical bulletin provides repair information to correct a customer concern of Knock Sensor Service Calibration DTCs P0326 P0331.
- 24-NA-180 Service bulletin2024-10-02 · Engine
- This technical bulletin provides repair information to correct a customer concern of Knock Sensor Service Calibration DTCs P0326 P0331
- PIP5985 Service bulletin2024-08-15 · Electrical System
- This Preliminary information communicates to the technician there maybe a connection concern for the knock sensors at connector X160 if P0326 and or P0331 has set.
- V0123042069630 Service bulletin2023-03-08 · Engine And Engine Cooling — Engine — Engine Control Module (Ecu/Ecm)
- ECM Update Programming for DTC P2407, P0326, P0442.
- PIP5529B Service bulletin2019-09-06 · Electrical System
- This Preliminary information communicates additional diagnostics and repair to assist in resolving a malfunction indicator lamp illumination due to any combination of diagnostic trouble codes P0068 P0101 P0106 P0171 P0131 P0137 P0324 P0326 P0331 P0506.
- PIP5529A Service bulletin2018-02-28 · Electrical System — Instrument Cluster/Panel
- This Preliminary information communicates additional diagnosticsand repairto assist in resolving a malfunction indicator lampillumination due to any combination of diagnostic trouble codes P0068 P0101 P0106 P0171 P0131 P0137 P0324 P0326 P0331 P0506.
What P0326 means
Source: SAE J2012 / OBD-IIP0326 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
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 P0326
Source: NHTSA files and the OBD-II standardCan I keep driving with P0326 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.