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Man, it feels so good getting rid of that CEL. Now I can pass smog!
So if anyone ever needs to bypass their knock sensor without tripping a CEL, here is what you need to know.
First of all, you can't ground it out or replace it with a resistor. The knock sensor is not an electrical load, it actually produces it's own voltage. Your ECU is looking for a variable voltage from the sensor.
So what you want to do is mimic the voltage output. Here is a guide of what to do:
1. First, go to Radioshack and buy a piezo transducer, part #273-073. You will find it will all the buzzers because that it's intended for. It costs $1.99.
2. Flip to the back of your haynes and look at the chassis electrical pages. Find which wire going into your ECU is for the knock sensor. If you have a 96-00 civic, it is the Red wire with a blue stripe. MAKE SURE YOU DON'T MISTAKE IT FOR THE BLUE WIRE WITH A RED STRIPE. That's for your AC system. Cut the wire about 6" from the ECU.
3. Tape the transducer to your fuel rail.
3. Weave a single wire from your fuel rail back to your ECU.
4. Connect the speaker wire to the (+) wire on the transducer.
5. Connect the other end of the wire to the Red/blue wire on your ECU.
6. Connect the (-) wire on the transducer to a good ground.
So basically, the positive wire of the transducer goes to the ECU and the negative wire goes to ground. I taped the transducer to the fuel rail because that's where I found it made the most voltage (most vibration).
The transducer only makes about a half a volt at 4k rpms and the ECU usually sees about 1.5 volts. So if you try this and it doesn't work, you will have to find a better location to tape the transducer or you will have to add a second transducer to bump up the voltage.
What else can I help you with?
Where is the knock sensor located on a 1993 Honda Civic EX?
1993 Honda Civic EX's dont have knock sensors.
Where is the knock sensor on a 2001 Honda Civic LX 1.7 L engine?
knock sensor position
Where is the knock sensor located on a 97 Honda civic ex?
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Knock sensor located for 2000 Honda civic ex?
Near the spark plug #2
What is cost of replacing knock sensor on 1995 Honda Civic?
The price is around $50 to $100 for the sensor and about 30-40 minuets to change when cool.
Where is knock sensor for Honda Passport 98?
Where is knock sensor for Honda Passport 98?Read more: Where_is_knock_sensor_for_Honda_Passport_98
Where is the knock sensor on a 2009 Honda Civic?
The knock sensor on a 2009 Honda Civic is located on the engine block, typically on the cylinder head or near the intake manifold. To access it, you may need to remove components such as the intake manifold or other surrounding parts, depending on the engine configuration. It's advisable to consult a repair manual for specific details and steps.
Where is a knock sensor on civic 2002?
The knock sensor on the 2002 Civic is on the engine block. It is located on the intake manifold just below the engine oil pressure switch.
Can knock sensor of 2011 Chevy Suburban can be bypass?
yes
Location of Honda 3.5 knock sensor?
The knock sensor for a 3.5 Honda engine is located on top of the motor under the intake. It is about a 1.5 hour job to replace it.
Will a knock sensor on a 1994 Honda Accord knock sensor fit 2002 Honda Accord fit?
No, a knock sensor from a 1994 Honda Accord will not fit a 2002 Honda Accord. The two models have different engine designs and specifications, which means their components, including the knock sensor, are not interchangeable. It's essential to use parts that are specifically designed for the model year and engine type to ensure proper function.
How do you change a knock sensor on a 2001 Honda civic?
A knock sensor is to let you know that there is a noise in the engine. It is rare that one fails. If you had someone read codes and the knock sensor was the one to come up, that only means that that circuit is the one setting the code. You need to have someone diagnosis the problem. You could have a rod knocking or any loud noise detected could set the code.
