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2001 Toyota Solara V6 Intermittent Check Engine Light P0330 - Knock Sensor Bank 2 Diagnosis and Repair Guide

Model: 2001 Solara v-6 Fault Code: P0330 Posted: 2012-01-05 12:20

My 2001 Toyota Solara SLE with a 6-cylinder engine is experiencing an intermittent check engine light that triggers randomly—sometimes for minutes, other times after hours or days. A diagnostic scan revealed code P0330, indicating a knock sensor fault in Bank 2 (rear cylinder bank). The vehicle runs smoothly under normal conditions, and the issue appears to be sporadic. The knock sensors are located beneath the intake manifold. I'm wondering if this repair requires any unexpected steps or tools. Should I replace both knock sensors during the service, or is it safe to only replace the one flagged by P0330? I've been advised to use OEM parts exclusively (approximately $190 each at Toyota), which adds about $30 per sensor compared to aftermarket options. Given that the problem is intermittent, should I simply ignore it and monitor for further symptoms—or take action now? The vehicle has accumulated 174,00 or miles and appears otherwise reliable. Any expert input on whether this code warrants immediate attention would be greatly appreciated.

Related fault codes
P0330
Comments (2)
Anonymous 2012-01-06 10:35

Replacing the knock sensor is not difficult if you have basic mechanical skills. You don’t need to fully remove the intake plenum—just loosen and detach the bolts securing it. Gently lift the plenum enough to access the 12mm fastener holding the sensor in place. Be cautious: do not pull too hard or too soon, as this could damage the manifold or surrounding components. The P0330 code specifically refers to the rear knock sensor (Bank 2). This repair is manageable with proper care and tools. Good luck!

Anonymous 2012-01-06 20:22

Thanks for the clarification. I do have solid mechanical experience and feel confident handling this task. However, I'm still unsure about the intermittent nature of the P0330 code—could it be a false positive or due to sensor wear? Should I replace both sensors in Bank 1 and 2 as a preventive measure, or is it safe to only replace the one showing the fault?