I performed the diagnosis right, but I get three codes. 03 04(knock sensor) 06 08(cylinder 1 misfire), and 14 06, which is too high on the decoder for the long pulses. Anybody know what it is?

Secondly, is the cylinder 1 misfire mean it happened once, or it is continually happening. If it is continually, how much will it cost to fix the knock sensor, misfire, and whatever 14 06 is?

Thanks.

 

By the way, if it helps, it is a 99 SE stick.

 

Reset the ECU and see if the same codes come back. The misfire may have been a one-time event. The KS is about $120 for the sensor and costs about 20 minutes and a pair of bloody hands to install.

 

The ECU will usually record multiple occurrences of the mishap BEFORE it trips the MIL (Malfunction Indicator Lamp--Check Engine Light). Some mishaps need happen only once to store a code/trip the light.
"The OBD II system detects a misfire on most vehicles by monitoring variations in the speed of the crankshaft through the crankshaft position sensor. A single misfire will cause a subtle change in the speed of the crank. OBD II tracks each and every misfire, counting them up and averaging them over time to determine if the rate of misfire is abnormal and high enough to cause the vehicle to exceed the federal emissions limit. If this happens on two consecutive trips, the Check Engine light will come on and flash to alert the driver when the misfire problem is occurring.
Misfire detection is a continuous monitor, meaning it is active any time the engine is running."

-Courtesy: http://www.babcox.com/editorial/ic/ic10224.htm

The cylinder misfire may happen more than once, and you may never notice it.

The knock sensor can usually be replaced (if you do it yourself) for around $100, give or take some cabbage.

 

Still 03 04; 06 08; 14 06

 

You may just have a bad plug in Cylinder #1. The knock sensor code may be getting triggered off of the misfire code. If you've noticed a reduction in performance, or have been getting crappy mileage lately then your knock sensor may be gone, too. Otherwise it might be just a ghost code.

No idea what 14 06 is.

I currently have 0201 (Ignition Signal Circuit), 0304 (Knock Sensor) and finally got 0603 (Cylinder #6 Misfire) and this is probably a bad coil. My mileage and performance has been fine so I don't think the KS is bad also. After I get the coil replaced I'll see what, if anything, comes back.