The engine code P0330 is set when your vehicle’s computer perceives a problem with the knock sensor or its circuit. This guide will give you a general idea of the common causes and symptoms of this code, how to troubleshoot it, and more.
Diagnostic trouble code (DTC) P0330 stands for “Knock Sensor 2 Circuit (Bank 2).” It indicates that a malfunction has been detected with the #2 knock sensor or its circuit.
The knock sensor monitors engine “knock”—this indicates that the engine is experiencing unusual combustion in the form of detonation or pre-ignition.
The knock sensor is usually bolted or threaded into the engine block. It sends a message to the vehicle’s computer or powertrain control module (PCM) whenever it detects that one or more of the engine cylinders are knocking. The PCM then uses the information to adjust the ignition timing in order to prevent more knocking.
The P0330 code is stored in your vehicle’s memory when the PCM detects that the input voltage from the knock sensor 2 is either too high or too low. If left unaddressed, this error code could lead to more serious engine problems and damage.
If you’re planning to fix P0330 yourself, you can read our in-depth technical discussion about knock sensors for more information. Otherwise, continue reading for the most likely causes of P0330.
Code P0330 may appear on some Lexus vehicles. On a 1999 Lexus ES300 3.0L V6, for example, the code appears because of the following conditions:
Determining the root cause of any trouble code is important when coming up with an effective, long-term solution to the problem. Here are the possible causes of the P0330 error code:
Below is a list of the common symptoms you may encounter when you’re dealing with this error code:
Troubleshooting OBD-II codes, like the P0330, involves determining the root cause. However, this can prove to be difficult, given that most codes have multiple possible causes.
For the average DIYer, it’s important to rely on easy-to-follow and informative resources, such as repair guides and other manuals. You can use the video resources below to get more information on how to diagnose the P0330 code:
While we recommend bringing your vehicle to a professional mechanic, experienced vehicle owners can also attempt to fix the P0330 code themselves. Here are the steps to try and fix the P0330 code:
The P0330 code might not be the only code that your scan tool’s detected. Take note of any other codesto help diagnose the problem faster.
Start with a clean slate and do a road test to see if the problem returns. Run your vehicle uphill and try some hard acceleration to try and induce engine knock that can trigger the P0330 code. If the check engine light comes back on, you can scan for codes again and cross-check them with your previous list to see if they’re the same or different.
Use a multimeter to check the knock sensor voltage to make sure it’s within the proper operating range of 6 kHz to 15 kHz. If the voltage is off, there’s likely a problem with the wiring around the knock sensor. Check for damaged or disconnected wires and replace these as needed.
When the temperature sensor voltage is the one outside suitable operating ranges, then it could be the temperature sensor giving false readings to the PCM. The proper operating range depends on the temperature. For a cold engine, the temperature voltage sensor will read 2V. A warm engine will read 0.5V. Abnormal readings indicate an issue with the sensor, which can lead to the engine running lean as well as engine knock. Check the temperature sensor as well as the connected wires and replace parts accordingly if you find issues.
If the knock sensor is the problem, we recommend replacing both it and the harness to resolve code P0330.
If replacing the knock sensor doesn’t solve the P0330 code, then it’s possible that the engine coolant system is malfunctioning. Run tests on the system and resolve what you can if the check engine light remains on even after you replace the knock sensor and harness.
Identifying the source of the P0330 code can be tricky, and the solutions for code P0330 on a Toyota Camry might differ from the solutions for code P0330 on a Ford F150. If all else fails, we recommend taking your vehicle to a licensed mechanic for a professional assessment and repair.
Does your car or truck have a P0330 code because its knock sensor has failed? It’s best to stop driving it until you replace the faulty part. Engine problems are some of the costliest to fix, so you don’t want to add any more damage caused by knocking. Thankfully, ordering a new knock sensor from CarParts.com is easy.
Here at CarParts.com, we simplify finding and ordering a replacement knock sensor that fits your vehicle. Once you access our easy-to-navigate website, enter your vehicle’s year, make, model, and engine in the integrated selector feature. The search results will show the knock sensors that will fit your car or truck. Our products are on hand and ready to ship from our strategically located warehouses, saving you time waiting for your new parts. Our customer service team is always available to help you with questions regarding our knock sensors, such as their cost and fitment.
So, what are you waiting for? Shop for our knock sensors today, and enjoy great savings on a product that fits your needs!
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