Drive with caution — fix soon.
P0325 indicates a fault in the Bank 1 knock sensor circuit. The knock sensor listens for engine knock (pinging) and lets the computer adjust timing to protect the engine. The cause is often a failed sensor, wiring issues, or a loose connector, and it's usually a manageable repair.
$150 – $500
Varies by vehicle and root cause.
Usually yes for a while, but the engine loses some of its knock protection. To avoid long-term wear, have it fixed within a reasonable time.
Typically between $150 and $500. The sensor itself can be cheap, but on some engines it sits under the intake, which raises labor cost.
It's moderate. It won't usually strand you, but driving long-term without knock protection can risk engine damage if real knock occurs.
It's a small sensor that detects engine vibration from abnormal combustion, letting the computer retard timing to keep the engine safe.