P0328: Knock Sensor 1 Circuit High (Bank 1)
The knock sensor signal is higher than expected. It can be a sensor fault or a real mechanical noise.
Green, yellow, red: three ways P0328 can look
The same code can be a quick fix or a reason to pull over. Match your situation to the closest example.
Keep an eye on it
Drives fine.
Schedule a repair
Pinging or power loss. Diagnose soon.
Stop and get help
Heavy knocking. Stop working the engine hard.
Symptoms you might notice
- Usually none
- Possible pinging
Common causes, cheapest first
- Failed sensor or wiring
- Real engine knock from low-octane fuel or carbon
- Loose engine parts making noise
What you can check before calling
- Use the fuel grade your owner's manual calls for
A code points to a system, not a part. Replacing parts based on the code alone is how people spend money without fixing the problem. Testing confirms the cause first.
Generic codes (second character 0) mean the same thing on every vehicle. Some manufacturers add their own details, so check service information for your exact vehicle.
Related codes
More engine sensors codes
Look up another code
Cummins fault code (like 1922), J1939 SPN and FMI (like SPN 3251 FMI 0), or an OBD-II code (like P0420).
Questions
What does P0328 mean?
P0328 means "Knock Sensor 1 Circuit High (Bank 1)". The knock sensor signal is higher than expected. It can be a sensor fault or a real mechanical noise.
Can I drive with code P0328?
It depends on what the vehicle is doing. Green: Drives fine. Yellow: Pinging or power loss. Diagnose soon. Red: Heavy knocking. Stop working the engine hard.
What causes P0328?
The most common causes are: failed sensor or wiring; real engine knock from low-octane fuel or carbon; loose engine parts making noise.
Is P0328 a serious code?
It can be. Heavy knocking. Stop working the engine hard.
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