B3791 Subaru Auto Trouble Code

B3791 Subaru Auto Trouble Code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.

The crank but won't start condition, along with the trouble codes may make you think you've got a PATS anti-theft system problem. However, Ford reports that these codes are all related to software bugs. The only way around the problem is to reprogram the PCM with the latest software.

B3791 Subaru Possible Solution:

Excessive air inflow can be caused by a vacuum leak, a dirty sensor or, an exhaust gas recirculation valve not closing properly. If the problem is not enough fuel, the culprit may be dirty injectors or fuel filters, a weak fuel pump or a leaky fuel pressure regulator. The lean fuel mix error may be accompanied by rough idling, engine misfires, hesitation during acceleration and overall poor engine performance.

B3791 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

B3791 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 B3791 Subaru code, first check to make sure you're getting a good 5 volt reference signal at the sensor.

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