Where is the bank 2 knock sensor on my engine?

Bank 2 is whichever bank doesn't contain cylinder 1, and the knock sensor lives on that bank's engine block. On most transverse V6 engines (Honda Pilot/Odyssey J35, Toyota Highlander/Camry 2GR-FE, Nissan Pathfinder/Murano VQ35) bank 2 is the rear bank closest to the firewall — harder to access and usually requires intake removal or other component removal to reach. On longitudinal V6 and V8 engines (Ford Mustang Modular V8, Chrysler Hemi, GM LS-family) bank 2 is the passenger side, often accessible from underneath. On GM LS trucks specifically, both knock sensors sit in wells in the lifter valley under the intake manifold, so accessibility is identical to bank 1. Verify with a service manual before starting — wrong-bank repairs on V-engines waste real labor money.

Will P0330 hurt my engine over time?

Probably not in the short term. The engine still runs, and the PCM defaults to a conservative ignition timing strategy that protects against detonation by retarding timing across the board. The risk is more subtle: real detonation under heavy load or with low-octane fuel won't be detected on bank 2, and sustained knock damages pistons, rings, and bearings over time. Most drivers experience no harm from driving with P0330 for weeks to a few months. The risk increases with hot weather, low-octane fuel, heavy loads (towing, mountain grades), or aggressive driving. Don't ignore the code indefinitely, but you don't need to park the vehicle the day it sets either.

Should I replace both knock sensors at the same time?

On V-engines with under-intake or otherwise labor-intensive knock sensor access — yes. On GM LS trucks (4.8L, 5.3L, 6.0L), Toyota V6, Honda V6, and Nissan VQ-series, replacing both knock sensors during a single intake-removal operation is the standard recommendation. The reasoning is simple: both sensors have lived through the same heat cycles, the same water exposure, and the same aging. If one has failed, the other is statistically likely to fail within months. Doing both at once costs only a small amount of additional parts ($30-150) but avoids a second round of intake removal labor. On platforms where access is easy (most longitudinal V8s, some Subaru and Mazda configurations), replacing only the failed sensor is fine.

How much does it cost to fix P0330?

Variable by access depth. On accessible bank 2 configurations (most longitudinal V8s, certain easier-access V6 platforms) total repair is $200-400. On transverse V6 engines with bank 2 against the firewall, expect $400-700 because of access labor. On GM LS trucks where both sensors live under the intake manifold, plan on $500-1000 for both sensors replaced during a single intake-off operation. Wiring repair, if that's the actual fault rather than the sensor, runs $100-400. As with any knock sensor code, the diagnostic time to confirm the sensor is the real fault (versus wiring or connector) is worth investing in before authorizing the labor-heavy access work.

OBD-II trouble code

P0330: Knock Sensor 2 Circuit Malfunction (Bank 2)

The bank 2 knock sensor circuit has failed — the PCM is no longer hearing the engine on the side without cylinder 1. On V6 and V8 engines this means half of the engine is operating without knock protection, and the PCM defaults to conservative ignition timing across both banks.

Quick facts

System: Powertrain
Category: Knock & Other
Severity: Medium severity
Drivable: Usually safe to drive short-term
Repair cost range: $150 – $1,000
DIY difficulty: Intermediate DIY

What does P0330 mean?

P0330 is the bank 2 partner to P0325. Where P0325 covers the bank 1 knock sensor (or the single sensor on inline-four engines), P0330 specifically covers the bank 2 knock sensor on V6 and V8 engines. The PCM uses both sensors to listen for detonation on each bank independently — engines can knock asymmetrically, and bank-specific sensing lets the PCM pull timing on the affected bank without compromising the healthy bank's performance.

Bank 2 identification matters here as much as on the fuel trim codes. Bank 2 is the bank that does NOT contain cylinder 1. On most transverse V6 engines (Honda J35, Toyota 2GR-FE, Nissan VQ35) bank 2 is the rear bank against the firewall — and that's why P0330 tends to be the more labor-intensive sister of P0325. The bank 2 knock sensor on these engines is harder to reach, often requiring intake manifold or other component removal to access. On longitudinal V6 and V8 engines (Ford Modular, Chrysler Hemi, GM LS) bank 2 is the passenger side. Wiring diagrams vary enough that always verify before assuming.

The physical failure modes are the same as P0325, P0327, and P0328: aged piezo crystal inside the sensor, water-corroded connector (especially on GM LS-family trucks where both knock sensors share the under-intake well configuration), or harness damage between the sensor and the PCM. What changes is the labor depth — bank 2 access on transverse engines is the worst-case scenario for many people.

Drivability symptoms mirror the other knock sensor codes. The engine runs, but the PCM falls back to conservative ignition timing across both banks (most PCMs treat any knock sensor circuit fault as a reason to retard timing globally, not just on the affected bank). Power drops slightly, fuel economy drops a couple MPG, throttle response may feel softer. Real damage from undetected detonation is the long-term risk, particularly under heavy load or with low-octane fuel.

One useful note about V8 platforms: GM LS trucks tend to set P0327 (bank 1) and P0330 (bank 2) together when the under-intake wells flood. If both codes are set on a GM LS engine, plan on replacing both sensors at once during the intake manifold removal — the labor is identical and the second sensor is almost guaranteed to fail within months of the first.

Common causes

Failed bank 2 knock sensor — piezo crystal degraded internally (the dominant cause)
Corroded bank 2 sensor on GM LS trucks where both sensors sit in under-intake wells prone to water ingress
Open or shorted knock sensor signal wire in the bank 2 harness routing
Failed bank 2 connector with corroded or pushed-back pins
Loose bank 2 knock sensor — incorrect torque on previous repair affects mechanical coupling
Aftermarket sensor of wrong specification installed on bank 2
Shared 5V reference circuit fault affecting both banks (look for P0325 alongside)
PCM signal-input fault on the bank 2 circuit (rare)

Symptoms

Check Engine Light on
Mild loss of power, particularly under load
Reduced fuel economy
Slightly delayed throttle response
Engine sounds normal in most cases — no obvious driveability symptom
Possible pinging under heavy load if real bank 2 detonation is occurring undetected

Diagnostic steps

1.Identify bank 2 correctly for your specific engine before starting. On transverse V6s, bank 2 is usually the rear/firewall bank. On longitudinal engines, bank 2 is usually the passenger side. Wrong-bank repairs are expensive when the labor is heavy.
2.Pull all codes. P0330 alone is the bank 2 specific case. P0330 with P0325 or P0327 may point at shared wiring or PCM-side issues affecting both banks.
3.On GM LS trucks, plan for intake manifold removal. Check the under-intake wells for water pooling before assuming the sensor is bad — water in the wells is the leading root cause and may require drainage cleanup as part of the repair.
4.Disconnect the bank 2 knock sensor connector and measure resistance across the sensor terminals. Compare to OEM spec — typically several hundred kohms to several megohms for piezo sensors. Out-of-spec confirms a failed sensor.
5.Back-probe the signal wire at the PCM connector to check continuity from PCM to sensor.
6.Inspect the bank 2 sensor connector and harness routing — look for corrosion, oil contamination, chafe points.
7.If the sensor and wiring both test clean, suspect intermittent connector contact and clean the connector pins thoroughly.
8.When replacing the sensor, torque to spec — knock sensors rely on mechanical coupling and incorrect torque (either direction) affects function. After replacement, drive through heavy-load conditions to confirm the code stays off.

Repair cost

$150 – $1,000

Knock sensor part itself is $30-150. On engines where the bank 2 sensor is accessible (most longitudinal V8 platforms, some transverse engines with reasonable rear-bank access) total replacement is $200-400. On transverse V6 platforms where bank 2 sits against the firewall (Toyota 2GR-FE, Honda J35, Nissan VQ35) expect $400-700 because of access difficulty. GM LS trucks where both sensors live under the intake run $500-1000 for the pair — most owners replace both sensors at once because the labor is identical. Wiring repair is $100-400.

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DIY vs shop

This is an intermediate DIY job. It usually involves diagnostic steps, specialty parts, and some careful work in tight spaces. If you have the tools and a service manual or trustworthy video for your specific vehicle, it is achievable in a weekend. Otherwise, a competent independent shop will be faster.

Related codes

P0325 P0327 P0328P0332P0333P0300