P033A OBD Error Code: Problem & Solutions

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The engine knocking can be sensed by the knock sensor by using a piezoelectric element. The sensor is attached to the cylinder block, cylinder head as well as intake manifold. The knocking vibration from the cylinder block can be sensed as vibrational pressure. This pressure would then be converted into a voltage signal and would be then sent to engine control module. This signal is then used by the engine control module to retard the ignition timing and protect the engine from damaging pre-ignition.

The P033A fault code can be described as Knock Sensor 4 Circuit Bank 2.

Want to learn something more about this fault code?

This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model.

What causes this problem with the Knock Sensor 4 Circuit Bank 2?

• Issue of ignition misfire
• Knock sensor 4 bank 2 might be faulty
• Flaws in the knock sensor
• Internal engine problem
• There can be poor electrical connection in the knock sensor 4 bank 2 circuit
• Problem of contaminated or subpar fuel
• Knock sensor 4 bank 2 harness might be opened or shorted
• Defects in the engine control module
• Defaults in the knock sensor control wiring or connectors
• Bad powertrain control module or PCM programming error

1. Knock Sensor - A faulty Knock Sensor can be troublesome. You can always rely on us as we have best auto parts for our customers.
2. Powertrain Control Module - If everything is alright with Knock Sensor, then there is surely some defect in Powertrain Control Module. Get it replaced before the situation gets worse.
3. Engine Parts - P033A code can display due to some issues in the Engine Parts. So, it is very important to replace the Engine Parts with us at equitable prices.
4. Fuel Delivery System Parts - Do you remember when was the last time you got your car Fuel Delivery System Parts checked up? Faulty Fuel Delivery System Parts can cause a lot of issues like displaying P033A code.
5. Fuel Ignition System - Are there some faults in your Fuel Ignition System? Don’t waste time and get them replaced or else P033A code can turn up.
6. Engine Control Module - OBD Code P033A can appear because of faulty Engine Control Module. Visit us to buy high grade ECM online at reasonable prices.
7. Diagnostic Tools - Willing to purchase some top-notch diagnostic tools online? We are here at your service.

There could be countless symptoms which that would accompany with this fault code. Willing to know some common symptoms of OBD Trouble Code P033A? Your wish is our demand. Have a look at them below:

Common Symptoms

• There can be hesitation when accelerating
• The engine performance might start decreasing
• Abnormal noises can start coming from the engine area
• Increase in the fuel consumption

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• The defected knock sensor should be replaced
• If you find out that there are some issues in the engine control module, then replace it
• Correct the issue of ignition misfire
• Replace or repair the knock sensor control wiring or connectors

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of Multimeter, Car Obd2 Code Scanner, Auto Code Reader, Subaru Knock Sensor and a lot more. We are sure that now all your issues would be resolved.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P033A code to be stored:

If you want to diagnose the P033A fault code, then you must need a diagnostic scanner, a digital volt/ohmmeter and a reliable vehicle specific repair resource will be necessary. If the engine sounds like it is knocking, or excessively noisy, address that issue before attempting a diagnosis for any knock sensor codes.

You should carefully check for technical service bulletins that may apply to your year/make/model. If the issue is a known issue there may exist a bulletin to help with diagnosis and repair specific to your exact problem. It can save a lot of your time as well as money.

You must do a visual inspection of all system related wiring harnesses and connectors. Look for corroded, burnt, or otherwise damaged wiring and connectors that may create an open or shorted circuit. Knock sensors are often in the lower part of the engine block. This makes them susceptible to damage when heavy parts like starters and engine mounts are replaced. System connectors, wiring, and fragile knock sensors are frequently broken during repairs in the vicinity.

Connect the OBD-II scanner to the vehicle diagnostic connector and retrieve all stored diagnostic codes and freeze frame data. Write this information down for use in the diagnostic process. Clear the codes and test drive the vehicle to see if any are reset.

If you find out that the P033A code is reset, then you must start the engine and use the scanner to observe knock sensor data. If the scanner indicates that knock sensor voltage is not within manufacturer’s specifications, use the DVOM to test live data at the knock sensor connector. If the signal at the connector is within specs, suspect a wiring issue between the sensor and the PCM. If voltage at the knock sensor connector is not within specifications, suspect a defective knock sensor. If replacement of the sensor is the next step, be sure to ensure you don't come in contact with hot coolant. Wait for the engine to cool before removing the old sensor.

Common Mistakes When Diagnosing The P033A Code

• Powertrain Control Module might start failing
• There can be some fault in the knock sensor
• Issues with the wiring