I got the Code P0333 Knock Sensor 2 Circuit High Input (Bank 2). Reset it and didn't come back...yet...
Reading about it in the FSM. Seems a
So what does this code really mean? Internal problem? Sensor problem?
The real issue is that it:
ECM sets ignition timing to maximum retard
We cant have THAT!!!!!Any thoughts help!
The Check Engine Light flickering on your dashboard is the first noticeable symptom for any engine code, including DTC P0327 and P0332 (both knock sensor error codes.)
However, you’ll need an OBD2 scan tool to help determine the exact cause of the lit Check Engine Light on your dashboard.
2. A Pinging Or Knocking Sound
If you have code P0332, the output signal from the knock sensor is too low to signal the ECM when your engine produces a pinging or knocking sound.
As such, the ECM doesn’t retard the ignition timing when the air-fuel combusts early, resulting in unresolved engine knocking while accelerating or idling.
3. Sudden Loss Of Engine Power
Your engine losing power is another common sign of a malfunctioning knock sensor or code P0332.
A faulty knock sensor may fail to report when the ignition timing is off, resulting in the spark plug igniting the air-fuel mixture late.
Due to this delay in combustion, the engine cannot fully burn the air and fuel mixture, resulting in your engine losing power.
4. An Overheated Engine
An overheated engine could result from faulty ignition timing going undetected by a bad knock sensor. However, it could also happen when you have a faulty serpentine belt or engine cooling system.
So, it’s best to get a mechanic to diagnose the issue and see if it’s due to the diagnostic trouble code P0332.
5. Increased NOx Emissions
An engine problem related to the “Knock Sensor 2 Circuit Low Input” error could damage your vehicle’s catalytic converter.
With a damaged catalytic converter, your engine cannot convert toxic pollutants into less harmful emissions, resulting in your vehicle failing the emissions test.
In some cases, increased NOx emissions could be due to a negative fuel trim caused by a bad O2 sensor.
6. Decreased Fuel Efficiency
A problem in your vehicle’s ignition timing or fuel trim may cause your engine to burn more fuel to propel the vehicle forward, resulting in fuel consumption spikes.
While a drop in fuel efficiency could be due to fault DTC P0332, there are many other potential reasons, so you should get your vehicle checked soon.
OBD-II Code P0333 is defined as a Knock Sensor 2 Circuit High. It indicates that the PCM has detected a voltage input reading in the knock sensor circuit for a particular cylinder that is not within a predetermined manufacturer’s limit. Typical knock sensor circuits consist of one 5-volt signal wire. If voltage readings exceed a variation of 10-percent from the manufacturer’s reference voltage, a code will be stored in the PCM and a malfunction indicator lamp will be illuminated. The knock sensor tells the engine control module (PCM) that the engine has an excessive vibration resulting from an incorrect fuel and air mixture. If the PCM does not receive a signal from the knock sensor, it will set code P0333. Code P0333 pertains to the sensor on bank 2 (the opposite side of the engine where the #1 cylinder is located).
While the P0333 code will not always result in drivability problems, it is important to have it inspected immediately as it may lead to serious damage and higher repair cost.
What causes the problem of Knock Sensor 2 Circuit High Input (Bank 2)?
- Faulty knock sensor
- Loose knock sensor
- Damaged knock sensor connector
- Open or shorted knock sensor circuit
- knock sensor circuit is shorted to voltage
- Circuit has electrical problem
- Low fuel pressure
- Inaccurate fuel octane
- Failed PCM
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
|Code P0333 Tech Notes
The P0333 code means that the Knock Sensor is not working properly. Problems with the knock sensor will not cause engine performance problems. Replacing the knock sensor usually takes care of the problem.
|What is the Cost to Diagnose the Code P0333?
Labor: 1.0
The cost of diagnosing the P0333 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.