code 23 knock sensor question

deetz · Post by **deetz** » Fri Apr 20, 2007 12:02 am

cars throwin this code, but still runs, is it safe to drive or should i go ahead and get it replaced?

90CivicEx · Post by **90CivicEx** » Fri Apr 20, 2007 12:47 am

deetz;37249 wrote:cars throwin this code, but still runs, is it safe to drive or should i go ahead and get it replaced?

Hmm check your wireing it may be loose then reset the code. If it comes back change it out and if it keeps persisting then it may just be something that happens with a built motor.

deetz · Post by **deetz** » Fri Apr 20, 2007 2:07 am

not to sound stupid, but what does a knock sensor do?

90CivicEx · Post by **90CivicEx** » Fri Apr 20, 2007 3:12 am

deetz;37277 wrote:not to sound stupid, but what does a knock sensor do?

I looked it up for ya cause I couldn't really put it into words what it does exactly, I somewhat knew what it did but this clarifys it for both of us.

Q) What does a knock sensor do?

A) A knock sensor is a specially designed listening device for car engines. It listens for engine knock, or detonation (pinging). Detonation can be very bad for an engine and is the result of the fuel/air mixture exploding too quickly instead of burning evenly and rapidly. This is due to either bad fuel, ignition timing which is too high, or built up carbon deposits in the engine (which increases the compression ratio). The sensor is small and consists of a piezoelectric sensor that listens for knock by detecting pressure. It is very sensitive and can be considered worthless if dropped. The vibrational pressure is then converted into a voltage and sent to the ECU for evaluation.