I have volve 99 s70 GLT, check light is on and ODB P0303 cylinder misfire 3 error is coming. Car is vibrating too.

Question edited for clarity.
Question moved to model category.

The P0606 fault code means that there's an error with your power control module (PCM). Your PCM is the computer inside your car that monitors all the vital systems. Basically, it's the brain of your car. Every time you start the car, the PCM runs a series of checks to make sure everything is okay.

How to Fix the P0606 Fault Code - Solo Auto Electronics

What the P0303 code means. The P0303 DTC is set when the ECU detects multiple misfires from cylinder 3. Misfires cause the ECU to set the Check Engine Light and put the vehicle into a failsafe mode to prevent damage. The Check Engine Light will remain until the code is repaired.

P0303 OBD-II Trouble Code: Cylinder 3 Misfire Detected

The car is in limp mode.
P0303 Cylinder 3 Misfire Detected
P0306 Cylinder 6 Misfire Detected
You need to clear fault codes with a scanner and see if the same fault occurs, if so, check the injectors for those cylinders. Swop cyl 3 injector with cyl 4 injector, if you get a code P0304, the injector is not working, and needs to be checked for a bad connection or maybe the injector is faulty, do the same with cyl 6, swop with cyl 5
Please keep me posted

Change the coil pack from cylinder 3 to cylinder 1. If you get a code p0301 after the swap, then that coil pack is bad, replace it. If you still get a p0303, then check the wiring to coil pack 3. If you have a combination coil pack, then replace the whole unit.

p0171 = fuel system too lean, this means vacuum leak or faulty oxygen sensor

p0303 = cylinder 3 misfire

p0325 = knock sensor malfunction.

p0303 and p0325 - i can see these working together, if a cylinder misfires, it will cause the knock sensor to trip. I would lean towards the coil and or ignition module, along with a faulty oxygen sensor.

Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The vibrating tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
P0313 - Misfire detected with low fuel

could also be a bad coil or ignition wire

1.Plugs
2. Vacuum leak
3. Injector fault
4. High or low fuel pressure.
Thats the list of things to check.
This is a #3 cylinder misfire.
There is also TSB about #3 injector needing added heat protection. This could definitely be the cause. I start at plugs and go from there.
Hope this helps.
Thank you,
Lee

Replace Plugs / Wire (or Coil #3 if it's coil on plug). DO NOT USE Auto Lite Platinum plugs, use factory VW NGK plugs. Otherwise it'll run like ****.

That is a cylinder misfire code have you had the plugs changed, could be a bad plug maybe bad coil, or injector how does it run

Hello I need a help.
I have 1999 lincoln town car 4.6L V8.They have check engine light on. P 0303 cylinder 3 missfire.
I was changed spark plugs,fuel filter. check compression test 150psi. fuel pressuer 50.
swiching cylinder 1 to 3 fuel injector and coil. but they still have engine code