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U3871 Engine Code Repair

Meaning of U3871 engine trouble code is a kind of network trouble code and when the check engine light comes U3871 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.

U3871 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 U3871 code is occuring now you should check U3871 repair processes.
Now don't ask yourself; What should you do with U3871 code ?
The solution is here :

U3871 Possible Solution:

U3871 Engine

The firing order is an important part of the overall design of the engine and is determined during the design of the engine to eliminate as much engine vibration as possible. If the firing order is changed or adjusted, the ignition from the spark plug is delivered at the wrong time and the engine functions poorly or does not run. The firing order for a particular engine is typically found in the repair manual specific to that model.

U3871 Code Meaning :

U
OBD-II Diagnostic Network (U) Trouble Code For Engine

3
Ignition System Or Misfire

8
Fuel Rail Pressure Sensor Circuit Malfunction

7
Cylinder 4 Contribution/Balance Fault

1
Shift Solenoid E Performance or Stuck Off

The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue.

U3871 OBD-II Diagnostic Network (U) Trouble Code Description

U3871 engine trouble code is about Shift Solenoid E Performance or Stuck Off.

Main reason For U3871 Code

The reason of U3871 OBD-II Engine Trouble Code is Fuel Rail Pressure Sensor Circuit Malfunction.

U3871 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.