Code Search

Please fill the "Code Box" to find engine fault code.

Car Models :

Please select your car.

How To Clear Check Engine Lights ?

Ways to clear check engine light on car panel.

Check Engine Light Dictionary

Ways to clear check engine light on car panel.

P3984 Engine Trouble Code

Meaning of P3984 engine trouble code is a kind of powertrain trouble code and when the check engine light comes P3984 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.

P3984 Fault Symptoms :

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

If one of these reasons for P3984 code is occuring now you should check P3984 repair processes.
Now don't ask yourself; What should you do with P3984 code ?
The solution is here :

P3984 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.

P3984 Code Meaning :

P	3	9	8	4
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine	Ignition System Or Misfire	Injector Circuit Malfunction - Cylinders	Ignition/Distributor Engine Speed Input Circuit Malfunction	Timing Reference High Resolution Signal A Too Many Pulses

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.

P3984 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P3984 engine trouble code is about Timing Reference High Resolution Signal A Too Many Pulses.

Main reason For P3984 Code

The reason of P3984 OBD-II Engine Trouble Code is Injector Circuit Malfunction - Cylinders.

Parts or components should not be replaced with reference to only a P3984 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

	Example: 0140