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B3791 Engine Trouble Code

Meaning of B3791 engine trouble code is a kind of body trouble code and when the check engine light comes B3791 code on the first you should check is the gas cap. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off. Alternately, you can purchase a gas cap for about $3 at an auto parts store. All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage.

B3791 Fault Symptoms :

  1. Check engine light comes on
  2. Engine stalling or misfiring
  3. Engine performance issues
  4. Car not starting
If one of these reasons for B3791 code is occuring now you should check B3791 repair processes.
Now don't ask yourself; What should you do with B3791 code ?
The solution is here :

B3791 Possible Solution:

B3791 Engine

Gasoline engines use spark plugs to cause an explosion of fuel within the cylinder. In a properly timed engine, this explosion occurs at the proper moment to send the piston to the bottom of the cylinder and provide power to the drive shaft. If the plug wires are out of sequence, the explosion occurs at the wrong time. The improper timing of the explosion sometimes pushes the cylinder the wrong direction or interferes with the turning of the crank. As a result, the engine stutters or backfires, if it runs at all.

B3791 Code Meaning :

B 3 7 9 1
OBD-II Diagnostic Body (B) Trouble Code For Engine Ignition System Or Misfire Fuel Rail Pressure Sensor Circuit Malfunction Crankshaft Position Sensor A Circuit Malfunction Crankshaft Position Sensor A Circuit Low Input

The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and air are in the cylinders. Optimizing this mixture means better fuel economy and fewer exhaust emissions.

B3791 OBD-II Diagnostic Body (B) Trouble Code Description

B3791 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Main reason For B3791 Code

The reason of B3791 OBD-II Engine Trouble Code is Fuel Rail Pressure Sensor Circuit Malfunction.

B3791 DTC reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.