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B0646 Engine Trouble Code

Meaning of B0646 engine trouble code is a kind of body trouble code and B0646 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.

B0646 Fault Symptoms :

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

If one of these reasons for B0646 code is occuring now you should check B0646 repair processes.
Now don't ask yourself; What should you do with B0646 code ?
The solution is here :

B0646 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.

B0646 Code Meaning :

B	0	6	4	6
OBD-II Diagnostic Body (B) Trouble Code For Engine	Intake Valve Control Solenoid Circuit Low	Fuel Temperature Sensor B Circuit Range/Performance	Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)	Ignition Coil A Primary/Secondary Circuit Malfunction

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.

B0646 OBD-II Diagnostic Body (B) Trouble Code Description

B0646 engine trouble code is about Ignition Coil A Primary/Secondary Circuit Malfunction.

Main reason For B0646 Code

The reason of B0646 OBD-II Engine Trouble Code is Fuel Temperature Sensor B Circuit Range/Performance.

B0646 DTCs may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.

	Example: 0140