Lincoln Ls P0121 Engine Trouble Code

When the check engine light comes Lincoln Ls P0121 code on the first you should check is the gas cap. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off. Alternately, you can purchase a gas cap for about $3 at an auto parts store. All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage.

Lincoln Ls P0121 Code Meaning :

When you check Lincoln Ls car engine light came on code P0121 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However manufacturer may have a different definition for the P0121 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

P0121 Fault Symptoms :

Lincoln Ls P0121 Possible Solution :

Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage.

Parts or components should not be replaced with reference to only a P0121 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.