P0327 Knock sensor 1 signal too low
0 owner reports and 140 manufacturer filings across 101 model years from Audi, Ford, Maserati, Subaru.
Where P0327 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2024 Audi S5 | Engine | 3 | — | |
| 2023 Audi S5 | Engine | 3 | — | |
| 2022 Audi S5 | Engine | 3 | — | |
| 2021 Audi S5 | Engine | 3 | — | |
| 2020 Audi S5 | Engine | 3 | — | |
| 2019 Audi S5 | Engine | 3 | — | |
| 2018 Audi S5 | Engine | 3 | — | |
| 2017 Subaru Forester | Engine | 3 | — | |
| 2016 Subaru Forester | Engine | 3 | — | |
| 2017 Subaru WRX | Engine | 3 | — | |
| 2016 Subaru WRX | Engine | 3 | — | |
| 2025 Audi A6 | Engine | 2 | — | |
| 2024 Audi A6 | Engine | 2 | — | |
| 2023 Audi A6 | Engine | 2 | — | |
| 2022 Audi A6 | Engine | 2 | — | |
| 2021 Audi A6 | Engine | 2 | — | |
| 2020 Audi A6 | Engine | 2 | — | |
| 2021 Audi A8 | Engine | 2 | — | |
| 2020 Audi A8 | Engine | 2 | — | |
| 2025 Audi SQ5 | Engine | 2 | — | |
| 2024 Audi SQ5 | Engine | 2 | — | |
| 2023 Audi SQ5 | Engine | 2 | — | |
| 2022 Audi SQ5 | Engine | 2 | — | |
| 2021 Audi SQ5 | Engine | 2 | — | |
| 2016 Ford Explorer | Engine | 2 | — |
Showing the 25 model years where P0327 appears most; it is on file for 101 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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P0327 by make
The same record, one make at a time: the model years, bulletins and owner reports that name P0327 on that maker’s vehicles.
What it gets filed under
140 manufacturer filings name P0327. 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 P0327.
- TSB_2081342_1 Service bulletin2026-03-13 · Engine
- This bulletin provides information when there is a Drive System Malfunction, DTCs related to Knock Sensor P0327, P0332, P0328, P0333 - V6 TFS.
- MAS004833 DS 25-26 Other2025-07-31 · Unknown Or Other
- This bulletin provides a corrective procedure for addressing false knock sensor DTCs caused by moisture accumulation. The procedure involves performing a controlled warm-up cycle to burn off the moisture from the sensor area, helping to resolve DTCs such as P0327, P0332, P032C, and P033C without unnecessary sensor replacement. Models Involved: (M156) Quattroporte, (M157) Ghibli, (M161) Levante
- TSB 18-2367 Service bulletin2018-12-12 · Electrical System
- Some 2016-2017 Explorer/Police Interceptor Utility vehicles equipped with a 3.5L EcoBoost engine built on or before 30-Sep-2016 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0325, P0327, P0330 and/or P0332. This may be caused by a wire chafe condition near the knock sensor connector C109. Follow the Service Procedure steps to correct the conditio
- 07-133-18 Service bulletin2018-11-14 · Engine
- This Service Information Bulletin announces design changes to the engine?s knock sensor which will help improve vehicle assembly line efficiency and increase durability. In some cases, the Check Engine light may illuminate and a knock sensor-related DTC set in the ECM memory: P0327, P0328, P0332 and P0333. The knock sensor for DIT engines is now utilized for NA engines to improve durability and re
- 07-133-18 Service bulletin2018-02-09 · Engine
- 2.0L Turbor Models only. This Service Information Bulletin announces design changes to the engine?s knock sensor which will help improve vehicle assembly line efficiency and increase durability. In some cases, the Check Engine light may illuminate and a knock sensor-related DTC set in the ECM memory: P0327, P0328, P0332 and P0333.
- 07-133-18 Service bulletin2018-02-09 · Electrical System
- 2.0L Turbor Models only. This Service Information Bulletin announces design changes to the engine?s knock sensor which will help improve vehicle assembly line efficiency and increase durability. In some cases, the Check Engine light may illuminate and a knock sensor-related DTC set in the ECM memory: P0327, P0328, P0332 and P0333.
What P0327 means
Source: SAE J2012 / OBD-IIKnock sensor 1 signal too low.
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 P0327
Source: NHTSA files and the OBD-II standardCan I keep driving with P0327 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.