Guide To P033B OBD Error Code Solutions

<<See All OBD Codes

This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another.

The P033B fault code can be described as Knock Sensor 4 Circuit Range/Performance Bank 2. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

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

• Knock sensor circuit is shorted to voltage
• Failure in the knock sensor
• There can be some defects in the knock sensor connector
• Knock sensor circuit might be opened or shorted to ground
• There can be moisture in knock sensor connectors
• Incorrect fuel octane
• Defaults in the powertrain control module
• Knock sensor 4 bank 2 might have some faults
• Knock Sensor 4 bank 2 circuit might have poor electrical connection
• Knock sensor 4 bank 2 harness might be opened or shorted
• Flaws in the engine control module

1. Powertrain Control Module - There can be some issues with the Powertrain Control Module due to which you may see P033B code appearing over and over again. Visit us to buy best quality PCM online.
2. Fuel Ignition System - A lot of issues can arise do to defective Fuel Ignition System. Did you just see P033B code flashing? Now you know the reason why it is appearing. Get it inspected and replaced on time.
3. Fuel Delivery System Parts - Faulty Fuel Delivery System Parts can be the reason why P033B code is flashing. Visit us to purchase top notch Fuel Delivery System Parts online.
4. Knock Sensor - It is an important auto part which needs full care. A faulty Knock Sensor can be a reason behind the flashing up of P033B code.
5. Diagnostic Tools - If you are searching for some top-quality Diagnostic Tools online, then you must visit us as we won’t let you down.
6. Engine Parts - There can be some issues with the Engine Parts due to which you may see P033B code appearing over and over again. Visit us to buy best quality car engine parts online.
7. Engine Control Module - Are you facing some faults in your Engine Control Module? Don’t worry and get them replaced or else P033B code can turn up.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• An illumination in the malfunction indicator lamp
• Pinging from engine under acceleration
• There can be audible knocking from the engine compartment

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:

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

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of Multimeter, Car Obd2 Code Scanner, Auto Code Reader, Subaru Knock Sensor and many more. Now all your problems would vanish within no time.

Here are some steps which you should follow in order to diagnose this fault code:

If an engine knock can be heard, then you must fix the source of the mechanical problem first then retest. Make sure the proper octane of fuel was used in the engine. Using lower octane fuel than what is specified can cause a ping or pre-detonation and may cause P033B.

Unplug the knock sensor and check for water or corrosion in the connector. If the knock sensor has a seal, verify there is no coolant from the engine block fouling the sensor. Repair as per the requirement.

Turn ignition to run position with engine off. Ensure that 5 Volts are present at the KS #4 connector. If there is, check for proper resistance between KS terminal and engine ground. You will need a vehicle specification for this. If resistance is out of specification, then you must replace the knock sensor. If resistance is normal, plug KS back in and idle the engine. Using a scan tool in data stream, observe KS value. Does it indicate a knock is present at idle? If so, replace the knock sensor. If the knock sensor shows no knock at idle, then tap on the engine block while observing the knock signal. If it doesn't show a signal that corresponds with the taps, replace the knock sensor. If it does, verify the knock sensor wiring isn't routed next to ignition wires. If there was no 5 volts present at the knock sensor connector while unplugged with Key on engine off then go back to the PCM connector. Turn ignition off and clip the knock sensor 5-volt reference wire in a location that is easy to repair or remove the wire from the PCM connector. With Key on engine off, check for 5 volts on the PCM side of the clipped wire. If 5 volts isn't present, suspect a bad PCM. If 5 volts is present, then you should repair short in 5-volt reference circuit.

Since the reference circuit is a shared circuit, you will need to check all engine sensors that are fed a 5-volt reference. Unplug each sensor one at a time until the reference voltage returns. When it returns the last sensor, you plugged in is the shorted sensor. If no sensors are shorted, check the wiring harness for short to voltage on reference circuit.

Common Mistakes When Diagnosing The P033B Code

• Powertrain Control Module might start failing
• There can be some default in the knock sensor
• The issue of wiring may arise