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 complaintsA 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.
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
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P0326. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- 24-NA-1802025-04-05 · Engine
- This technical bulletin provides repair information to correct a customer concern of Knock Sensor Service Calibration DTCs P0326 P0331.
- 24-NA-1802024-10-02 · Electrical System
- This technical bulletin provides repair information to correct a customer concern of Knock Sensor Service Calibration DTCs P0326 P0331
- PIP59852024-08-15 · 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.
- V01230420696302023-03-08 · Engine And Engine Cooling — Engine — Engine Control Module (Ecu/Ecm)
- ECM Update Programming for DTC P2407, P0326, P0442.
- PIP5529B2019-09-06 · 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.
- PIP5529A2018-02-28 · 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 generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. 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.