C2939 Subaru Auto Trouble Code

C2939 Subaru OBD2 specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.

Evaporative emissions systems test for a leak in the fuel tank and associated hoses. To perform the test, the computer pulls a vacuum and checks to see if the vacuum holds. Each car maker uses a different techniques to check, but most often it's some type of fuel tank pressure sensor.

C2939 Subaru 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.

C2939 Subaru Description For All Models :

Subaru 1.8
Subaru 1400
Subaru 1600
Subaru 360
Subaru Alfa
Subaru B11
Subaru B9
Subaru Baja
Subaru Coupe
Subaru Dl
Subaru Ff-1
Subaru Forester
Subaru Forester 1
Subaru Forester 2
Subaru Forester 3
Subaru G3x
Subaru G3x Justy
Subaru H6
Subaru Hm
Subaru Impreza
Subaru Impreza 2
Subaru Impreza 3
Subaru Justy
Subaru K111
Subaru Legacy
Subaru Legacy 3
Subaru Legacy 4
Subaru Leone
Subaru Liberty
Subaru M80
Subaru Mini Jumbo
Subaru Outback
Subaru Outback 2
Subaru Outback 3
Subaru Pleo
Subaru R1
Subaru R2
Subaru Rex
Subaru Sagres
Subaru Stella
Subaru Stx
Subaru Svx
Subaru Traviq
Subaru Tribeca
Subaru Vivio
Subaru Wx
Subaru Xt
Subaru Xv

C2939 Subaru Trouble Repair :

The sensors receive a 5 volt reference signal from the PCM. As pressure readings change, the sensor varies the voltage and the computer reads that to determine input. In the case of a broken wire, the sensor never sees the voltage and the computer assumes a major fault. So if you get this C2939 Subaru code, first check to make sure you're getting a good 5 volt reference signal at the sensor.

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