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P3821 Engine Trouble Code

Meaning of P3821 engine trouble code is a kind of powertrain trouble code and P3821 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.

P3821 Fault Symptoms :

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

If one of these reasons for P3821 code is occuring now you should check P3821 repair processes.
Now don't ask yourself; What should you do with P3821 code ?
The solution is here :

P3821 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.

P3821 Code Meaning :

P	3	8	2	1
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine	Ignition System Or Misfire	Engine Oil Temperature Sensor Malfunction	Turbocharger Boost Sensor A 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.

P3821 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P3821 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Main reason For P3821 Code

The reason of P3821 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

P3821 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