I have a 2002 ford taurus with codes B1155 P0306 P0316

The P0316 DTC code is a generic code that applies to all vehicles. This code means the powertrain control module (PCM) has detected a misfire shortly after startup, specifically within the first 1,000 revolutions. This code may also be triggered with another of the other misfire codes which are P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309, P0310, P0311, P0312. If you have another misfire trouble code also, you should diagnose and repair that code(s) first. Symptoms Symptoms of a P0316 DTC may include: MIL (Malfunction indicator lamp) illumination Rough engine start or idle Potential Causes Potential causes of this misfire code may include: Damaged or defective Crankshaft Position Sensor (CKP) CKP sensor wiring or connector fault Poor fuel quality Ran out of fuel Ignition system malfunction Fuel system malfunction: injector or fuel pump Mechanical engine problem Damaged PCM Possible Solutions First off, you'll want to repair any other misfire DTC codes if present prior to diagnosing this code. If you own a Ford vehicle and you have a P0316 along with one of the other misfire codes, you should check for appropriate TSBs (technical service bulletins), as there are some TSBs that in part involve reprogramming the PCM. Doing that requires specialized equipment. Some Ford vehicles even needed a new cylinder head as a result of the valve. Regardless, if you have a Ford with multiple misfire codes including this one, check for TSBs. If the P0316 is the only code, then it's time to do a bit more diagnosing of the crankshaft and camshaft position sensors, and their associated connectors and wiring. A tip we've found is "Since this code indicates a start up misfire, pay attention to items which may expand or contract when cold (if the code sets when the engine is cold), or hot (if the code sets on a hot restart)." Realistically, the freeze frame data from the PCM will be helpful in tracking down the problem. As will a good DVOM (digital volt-ohm meter), so you can perform tests on the wiring and the sensors.

Read more at: http://www.obd-codes.com/p0316
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Well code 306 is for a miss on cylinder six and code 316 is for a miss detected on startup, which you probably already know.
Since I assume you have replaced the ignition parts for that cylinder,
the next component to check is the injector. You may want to check fuel pressure too.

Need to get a can of gumout and with it idling spray around the top of the upper plenum to see if you have a vacuum leak if you have a leak it will either idle up slightly or kill the engine very very common on the 3.0 Taurus ,little more information would be helpful like how many miles are on the car

its abs code could be a wheels sensor or maybe the wire broke lots of time the sensor gets dirt or rust and cant read the teeth on the wheel hub. try taking sensor out and cleaning them see what happens.

Okay, you were getting code P0306, and a P0316. You have replaced plugs and swapped coils around are you still getting the code P0306? or is it a different code for a different cylinder now? Replacing your crankshaft position sensor in this case will merely waste your money. Its doing its job, the P0316 is telling you you had a misfire in the first 1000 revolutions of your engine at startup, the P0306 is telling you its probably cylinder #6 that had the problem. there is no code there indicating your CKP is bad.

Now if you swapped your coils and the misfire is still on cylinder 6, its either injector problem, or base engine. If the misfire has moved to another cylinder, replace that COP.

Hope helps.

Diagnostic Trouble Code (DTC) P0306 means that cylinder # 6 is misfiring. DTC P0316 means that cylinder #6 is misfiring bad enough that the computer has detected it within the first 1000 revolutions of the crank shaft. (I assume that these are the codes you are talking about because there is no such thing as a code "306" or "316" for your vehicle)

To put it plain and simple, you have a dead miss in cylinder #6.

This could be caused by several different things and must be properly diagnosed to prevent replacing a lot of things that do not fix the problem. It could be something as simple as a spark plug that didn't get gapped correctly, or it could be something major like a valve in your cylinder head that did not get checked or fixed properly when the head was off.

Hi

P0305 is misfire in cylinder #5.
P0306 is misfire in cylinder#6.
P0316 is misfire on start up.
Have the plugs on those 2 cylinders, and the 2 fuel injectors checked, also check for spark from the coil on those 2 plug wires.

Please get back to us if you have further query or else please accept the solution.

Thanks for contacting fixya.com

You have a misfire on #3 for code p0303 & misfire for code p0316

p0316
misfire detected during startup-first 1000 revolutions

p0301
cylinder no.1 misfire detected

Code P0316 means 'misfire detected first 1000 revs.'