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U3801 Engine Trouble Code

Meaning of U3801 engine trouble code is a kind of network trouble code and U3801 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,140 and you can't do it yourself unless you're an experienced mechanic.

U3801 Fault Symptoms :

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

If one of these reasons for U3801 code is occuring now you should check U3801 repair processes.
Now don't ask yourself; What should you do with U3801 code ?
The solution is here :

U3801 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.

U3801 Code Meaning :

U	3	8	0	1
OBD-II Diagnostic Network (U) Trouble Code For Engine	Ignition System Or Misfire	Engine Oil Temperature Sensor Malfunction	Cold Start Injector 1 Malfunction	Crankshaft Position Sensor A Circuit Low Input

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate.

U3801 OBD-II Diagnostic Network (U) Trouble Code Description

U3801 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Main reason For U3801 Code

The reason of U3801 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

Parts or components should not be replaced with reference to only a U3801 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

	Example: 0140