P0330 on Lexus
Knock Sensor 2 Circuit (Bank 2)
P0330 on Lexus vehicles indicates knock sensor 2 circuit (bank 2). Au7o has documented this code across 1 Lexus model — most commonly on ES. This powertrain code means the engine computer detected a malfunction in the circuit for knock sensor 2, located on engine bank 2 (the cylinder bank not containing cylinder 1). The knock sensor listens for engine 'knock' or 'ping' (abnormal combustion) and lets the computer retard ignition timing to prevent engine damage. This code indicates an electrical/circuit problem with the sensor signal, not necessarily actual knocking. Drivability is often normal, but the engine may run with conservative timing, reducing power and economy and risking damage if real knock occurs. Typical repair costs on Lexus range from $350 to $900, depending on the specific model and root cause.
Common Causes of P0330
- •Faulty knock sensor on bank 2
- •Damaged or corroded knock sensor wiring/connector
- •Open or short in the knock sensor circuit
- •Loose or improperly torqued knock sensor
- •Engine ground or shielding issues affecting the signal
- •Faulty engine control module (rare)
P0330 on Lexus by Model
Lexus ES(1 issue)
- XV20/XV30 ES (1MZ-FE): Knock Sensor Sub-Harness Chafes and Sets P0325 / P03301997-2003
On the 1MZ-FE V6 the two knock sensors sit in the valley between the cylinder heads, and their sub-harness bakes there under the intake manifold. The wire insulation hardens and chafes, shorting the signal wire to ground and setting P0325 (knock sensor 1 circuit) and/or P0330 (knock sensor 2 circuit). The ECU responds by pulling timing, so the car runs down on power and mileage with a permanent check engine light. The recurring forum lesson is that the harness - not the sensors - is usually the failed part: owners who replace only the sensors see the code return within days.
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What does P0330 mean on Lexus?▼
P0330 stands for "Knock Sensor 2 Circuit (Bank 2)." This powertrain code means the engine computer detected a malfunction in the circuit for knock sensor 2, located on engine bank 2 (the cylinder bank not containing cylinder 1). The knock sensor listens for engine 'knock' or 'ping' (abnormal combustion) and lets the computer retard ignition timing to prevent engine damage. This code indicates an electrical/circuit problem with the sensor signal, not necessarily actual knocking. Drivability is often normal, but the engine may run with conservative timing, reducing power and economy and risking damage if real knock occurs. On Lexus specifically, this code is documented across 1 model.
What causes P0330 on Lexus vehicles?▼
Common causes on Lexus: Faulty knock sensor on bank 2, Damaged or corroded knock sensor wiring/connector, Open or short in the knock sensor circuit, Loose or improperly torqued knock sensor, Engine ground or shielding issues affecting the signal. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0330 on a Lexus?▼
Repair costs on Lexus range from $350 to $900, depending on the specific model and root cause.
Which Lexus models have P0330 documented?▼
Au7o has documented P0330 on 1 Lexus model: ES.