B043F Trouble Code

View B043F obd/2 error code description and symptoms. B043F engine photo

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.

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

B043F Error Code Repair Process :

If your upstream heated o2 sensors swapped 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 B043F and engine control unit are in charge of monitoring a bunch of different upstream heated o2 sensors swapped, and if they get a reading that's a little out of whack, up pops the check engine light.

B043F 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.

Common Causes of B043F

A common cause of code B043F is the failure of Upstream Heated O2 Sensors Swapped, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Faulty oil control valve (OCV)
Faulty oil control valve (OCV)
Erratic camshaft position due to low oil pressure

B043F code for all cars

You can view according B043F DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B043F De Dion Bouton 6 Hp

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