B3621 Audi Q5 OBD Code

OBD/2 B3621 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 B3621, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code B3621 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.

B3621 Audi Q5 Error Code Repair Process :

If your overdrive band failed off 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 B3621 and engine control unit are in charge of monitoring a bunch of different overdrive band failed off, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Audi Q5 B3621 OBD2 Code

A common cause of code B3621 is the failure of Overdrive Band Failed Off, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Exhaust tube
Faulty Air Flow Meter
Intake Valve Timing Control Solenoid Valve circuit poor electrical connection

B3621 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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B3621 Audi Q5 OBD Code

B3621 Audi Q5 Error Code Repair Process :

Common Causes of Audi Q5 B3621 OBD2 Code

B3621 code for other Audi cars