P0325 is reported as bank 1 knock-sensor circuit fault. The next step depends on the full scan and the exact vehicle, not the code alone.
If the check-engine light is flashing, the engine runs roughly, or the vehicle is losing power, pull over safely and arrange help. Otherwise save the scan and arrange diagnosis.
This Ford document supports only its stated code and vehicle context. The code alone cannot identify a failed part, prove that another make uses the same definition, or clear a car for driving. Compare your full scan with the current exact-vehicle service information.
Read the Ford original: 1999 Powertrain Control/Emissions Diagnosis DTC descriptions Source date: document date not recorded; research checked: 2026-11-01.
What this code means
P0325: Bank 1 knock-sensor circuit fault. This is a source-scoped technical description. It does not prove that any named component has failed.
Namespace obd_reference
Make scope No exact vehicle application established
Definition status source supported definition vehicle applicability unverified
Why this exact code matters
This is a knock-sensor circuit report, not proof that the engine is mechanically knocking. Confirm the exact bank/sensor circuit and any abnormal engine noise separately.
Compare P0340: cam-position circuit. A related code is a different observation, not a second diagnosis.
Evidence to save for this code
- Make, engine, year and complete code
- Engine noise, oil-pressure warning or limp mode
Keep the complete module scan and any accompanying warning; a single emissions code cannot show every relevant fault.
Ask for a measured diagnosis
- Does the N-model water-intrusion bulletin fit, or does the Kia KSDS bearing-test branch fit?
- What diagnostic evidence supports sensor/wiring versus mechanical engine condition?
The Knock/KSDS codes require manufacturer context guide has the shared system checks and after-repair questions. Those broad checks apply to a system, while the meaning above is specific to P0325.
Vehicle and scanner limits
We have not verified this code for every make, model, year or engine. A generic emissions scanner may not read the body, chassis, transmission or EV module that holds related faults. Compare the full scan with the owner manual and manufacturer service information.
Sources and scope
- Ford — 1999 Powertrain Control/Emissions Diagnosis DTC descriptions Document: date not recorded · Research checked: 2026-11-01
- Hyundai — 24-EM-010H Document: 2024-12 · Research checked: 2026-11-01
- Kia — PI1803Y/Z revision 2 Document: 2020-06-09 · Research checked: 2026-11-01
Research snapshot: 2026-11-01. Source documents may have newer revisions. Verify current instructions and VIN eligibility with the manufacturer.