PO304--is # 3 cylinder misfiring
PO174---is a lean O2 Sensor Code on bank 2,
from the misfire
So you find the cause, of the ignition misfire,and NO,
it is not spark plugs,wires and a long list of parts, that
never fail.
It is a bad ignition coil or igntion module,which ever applies.
Sorry # 4 Misfire
Last number is the cyl in 304
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SOURCE: p0304 p0344
I was trying to get meanings for codes on my care.. I called the dealer & got some good info..
SOURCE: codes p1131,p1151,p0171,p0174,p0304
All are fuel related , as in running lean. I'd start by checking all vacuum lines for possible leak, then buy some spray cleaner for MAF sensor & give it a good spray or tuner spray from TV repair place or radio shack, is even better. Ford says not to (they'd rather sell new part) but it will work at least long enough to see if that's the problem before you replace a bunch of parts.
SOURCE: codes p1153 -p1140 -p1133-p0174
P0174 Basically this means that an O2 sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.
P0140 Basically this means the an O2 sensor in Bank 1 detected a lean condition, same as mentioned above. Bank 1 is the side where cylinder #1 is.
In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling.
P1133 and P1153 indicate that the HO25 Sensor has gone bad. There the O2 sensor to the left and right bank at the exhaust manifold. When the engine first start's the PCM runs on a open loop and ignores the O2 readings till it reaches it's operating temperature. Once the operating temperature has been reached the diagnostic will only run once per ignition cycle and if the PCM detects a lesser then specified value, a DTC of P1133 or P1153 will come up.
Once the problem has been repaired, after 3 start cycle will reset the MIL light. If the O2 is just dirty and slow to heat up try cycling the ignition start 3 times and the light should go off if the O2 sensor does not fail.
Try cleaning the MAF first and see if the light comes off after a few ignition cycle, If the service light is still on you can always have Auto Zone clear the DTC codes and see if it comes back which then check the left and right bank wire harness to the O2 sensors.
Good luck and hope this helps, keep me posted.
SOURCE: what does the code P0304 mean?
cylinder 4 is misfiring. Could be plugs, coil, or an injector issue.
SOURCE: 2003 Lincoln LS put a scanner on it and got 16
Unless your familiar with the cars systems
and I assume your not.
You take it to a repair shop
I have a 2004 LS V8
You can not work on that veh yourself
if your not famialiar with both OBD2
Sytems and the Lincolon LS
If you have a specific few questions
I will answer them.
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