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U3851 Engine Trouble Code

Meaning of U3851 engine trouble code is a kind of network trouble code and U3851 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.

U3851 Fault Symptoms :

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

If one of these reasons for U3851 code is occuring now you should check U3851 repair processes.
Now don't ask yourself; What should you do with U3851 code ?
The solution is here :

U3851 Possible Solution:

The crankshaft sensor signals the fuel injection computer or the ignition control when the cylinders are firing. This causes the ignition coil to provide a spark and the injector to inject fuel into each cylinder at the right time.If either sensor isn't working correctly, the car will run rough and the engine will be less efficient. In later car models, the car's computer can usually keep the vehicle running, but the engine warning light on the dashboard goes on to warn the driver.

U3851 Code Meaning :

U	3	8	5	1
OBD-II Diagnostic Network (U) Trouble Code For Engine	Ignition System Or Misfire	Engine Oil Temperature Sensor Malfunction	Cylinder 1 Injector Circuit Low	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.

U3851 OBD-II Diagnostic Network (U) Trouble Code Description

U3851 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Main reason For U3851 Code

The reason of U3851 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

U3851 the main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit.

	Example: 0140