B3934 Volvo C70 OBD Code

OBD/2 B3934 error code description and symptoms.

Low Speed Fuel Pump Primary Circuit Malfunction The PCM monitors the low speed fuel pump (LFP) primary circuit output from the PCM.
The test fails if: When the LFP circuit is commanded on (grounded), excessive current draw is detected on the LFP circuit; or when the LFP circuit is commanded off, voltage is not detected on the LFP circuit (the PCM expects to detect VPWR voltage coming through the low speed fuel pump relay coil to the LFP circuit). Open or shorted low fuel pump (LFP) circuit Open VPWR to low speed fuel pump relay Damaged low speed fuel pump relay Damaged PCM An open circuit or short to ground can only be detected with the low speed fuel pump.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

B3934 Volvo C70 Error Code Repair Process :

If your driver power window one touch window relay circuit failure check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system B3934 and engine control unit are in charge of monitoring a bunch of different driver power window one touch window relay circuit failure, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Volvo C70 B3934 OBD2 Code

A common cause of code B3934 is the failure of Driver Power Window One Touch Window Relay Circuit Failure, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Faulty spark plug (s)
Clogged or faulty fuel injector (s)
Foreign matter caught in fuel filler cap

B3934 is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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B3934 Volvo C70 OBD Code

B3934 Volvo C70 Error Code Repair Process :

Common Causes of Volvo C70 B3934 OBD2 Code

B3934 code for other Volvo cars