My 2002 xterra se no supercharged has a ses light steady and sometimes blinking when i drive, lack of power, the engine is shaking sounds like a old train, and very stink smell of gas i brought to autozone and the codes are P0300 and P0328 only said is a posible misfire, bad fuel system, bad ignition system, maf sensor, knock sensor but nothing in specific i already installed spark plugs and check the wires, please any suggestion?

SOURCE: nissan xterra knock sensor

It's the valley of the engine underneath the intake manifold. It's about an $800 job because the top of the engine has to come off. However, unless you have a supercharged xterra it shouldn't effect performance. Also, the knock sensor will not trip the check engine light, as it does not indicate a primary problem, so if your light is on you should have another code that should be fixed first.

SOURCE: code P2187

P2187 System Too Lean at Idle (Bank 1)

Check the MAF. this could be the reason for the O2 reading lean. if the MAF is ok and, the sensor is not damaged, replace the Os sensors.

SOURCE: Knock sensor in 2002 xterra se/sc

ok if it is getting spark at spark plugs that rules out ignition, let go to fuel, needs to check fuel pressure and also injector pulsation, if no pulsation fuel will not get into cylinder's, also a knock sensor will not keep an engine from starting, it controls ignition timing once engine is running.

Auto Repair Help

• 1420 Answers
• Posted on Jan 17, 2010

SOURCE: I have a 2003 xterra SE Supercharged, I was

Check-- the knock sensor should be replaced if it is setting a code. Second, the misfire on number 2 hole could be a defective injector. There is a known problem for the 2002 and 2003 models. Pull the plug from #2 hole and compare it to another plug. If #2 is black and the others are not you have a leaking injector. Also, perform an ohms check on all the injectors and I bet #2 will be less than the rest. make sure you use a quality sensor, Lee Davidian

SOURCE: I have a 2003 xterra SE Supercharged, I was

I had the same thing but it was my sparkplug wire was arching on the valve covers. my rmps would drop at idle so i look at the engine at night time and could visualy see the electrical arch real easy ,and the computer on your car reads the arch as a misfire, which it is, but the cause isnt your knock sensor just one cylinder is not having a fuel mixture ignition due to the spark not conducting throught the plug and ignighting the mixture.hence ur miss fire. Also ur can hear it, it kind sounds like a snaping noise once you have poped the hood that helped me find where it was at.