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U1221 Engine Trouble Code

Meaning of U1221 engine trouble code is a kind of network trouble code and when your car's 'U1221 Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.

U1221 Fault Symptoms :

Check engine light comes on
Engine stalling or misfiring
Engine performance issues
Car not starting

If one of these reasons for U1221 code is occuring now you should check U1221 repair processes.
Now don't ask yourself; What should you do with U1221 code ?
The solution is here :

U1221 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.

U1221 Code Meaning :

U	1	2	2	1
OBD-II Diagnostic Network (U) Trouble Code For Engine	Fuel And Air Metering	Manifold Absolute Pressure/Barometric Pressure Circuit High Input	Turbocharger Boost Sensor A Circuit Low	Crankshaft Position Sensor A Circuit Low Input

Is the fuel pump sometimes not priming when you turn the key to ON(II)? Start by measuring the fuel pressure and checking whether you have bright white-bluish spark at all four plugs. The mechanical timing is also something that you should check, as we mentioned above.

U1221 OBD-II Diagnostic Network (U) Trouble Code Description

U1221 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Main reason For U1221 Code

The reason of U1221 OBD-II Engine Trouble Code is Manifold Absolute Pressure/Barometric Pressure Circuit High Input.

Parts or components should not be replaced with reference to only a U1221 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

	Example: 0140