P3839 Bmw X3 OBD Code

OBD/2 P3839 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.

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code P3839, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code P3839 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.

P3839 Bmw X3 Error Code Repair Process :

If your vehicle failed a P3839 test and the P3839 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses prndl input #4 circuit failure a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look prndl input #4 circuit failure: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

Common Causes of Bmw X3 P3839 OBD2 Code

A common cause of code P3839 is the failure of PRNDL Input #4 Circuit Failure, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Camshaft Position Sensor harness is open or shorted
Intake Valve Timing Control Solenoid Valve circuit poor electrical connection
Incorrect Positive Crankcase Ventilation (PCV) hose connection

P3839 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

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

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P3839 Bmw X3 OBD Code

P3839 Bmw X3 Error Code Repair Process :

Common Causes of Bmw X3 P3839 OBD2 Code

P3839 code for other Bmw cars