All codes › P0325
P0325: Knock Sensor 1 Circuit (Bank 1 or Single Sensor)
What it means
The bank 1 knock sensor circuit has a fault, so the computer can't listen for engine knock.
Severity: Medium Computer may retard timing and cut power to protect against knock.
Common causes
- Failed knock sensor
- Damaged wiring (heat or rodents)
- Corroded connector
- Incorrect sensor torque
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Rarely DIY. Many knock sensors are under the intake manifold.
Repair cost
SEEDED ESTIMATE Roughly $130–$850
Most likely repair: knock sensor. Diagnosis fees, taxes and other causes are not included.
| Line | Low | High | Basis |
|---|---|---|---|
| Knock sensor | $30 | $206 | Typical listed retail range, source ($328 outlier excluded) |
| Labor 1–4 hr | $100 | $640 | $100–$160/hr, shop survey |
⚠️ This is an editorial placeholder range for this type of repair. It is not based on real invoices or licensed pricing data yet. Real ranges will appear here once enough reader invoices for P0325 are verified.
Verified reader invoices for P0325: 0. Share your repair bill to help build real costs.
Tools that can read P0325
- ScanFixAI: Pro $29.99/mo or $249.99/yr
- OBDAI: Annual PRO bundle $299
- BlueDriver Pro Next-Gen: $119.95 list ($99.95 sale seen)
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